Can't install Jekyll on Mac OS Big Sur (Apple Silicon M1)

[osvik]

I can't install Jekyll in Mac OS Big Sur. I've tried different approaches as described in your install pages. None has worked:

https://jekyllrb.com/
https://jekyllrb.com/docs/installation/macos/

I've tired first local install and latter global install, both returned the same error messages.

My Environment

Software	Version(s)
Operating System	Mac OS Big Sur (Apple Silicon) M1
jekyll	Latest
github-pages	No
xcode version	12.4

% ruby -v
ruby 2.6.3p62 (2019-04-16 revision 67580) [universal.arm64e-darwin20]

% which ruby
/usr/bin/ruby

% gem env

• RUBYGEMS VERSION: 3.0.3
• RUBY VERSION: 2.6.3 (2019-04-16 patchlevel 62) [universal.arm64e-darwin20]
• INSTALLATION DIRECTORY: /Library/Ruby/Gems/2.6.0
• USER INSTALLATION DIRECTORY: /Users/osvaldogago/.gem/ruby/2.6.0
• RUBY EXECUTABLE: /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/bin/ruby
• GIT EXECUTABLE: /usr/bin/git
• EXECUTABLE DIRECTORY: /usr/local/bin
• SPEC CACHE DIRECTORY: /Users/osvaldogago/.gem/specs
• SYSTEM CONFIGURATION DIRECTORY: /Library/Ruby/Site
• RUBYGEMS PLATFORMS:
  • ruby
  • universal-darwin-20
• GEM PATHS:
  • /Library/Ruby/Gems/2.6.0
  • /Users/osvaldogago/.gem/ruby/2.6.0
  • /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/gems/2.6.0
• GEM CONFIGURATION:
  • :update_sources => true
  • :verbose => true
  • :backtrace => false
  • :bulk_threshold => 1000
• REMOTE SOURCES:
  • https://rubygems.org/
• SHELL PATH:
  • /Users/osvaldogago/.gem/ruby/2.6.0/bin
  • /usr/local/bin
  • /usr/bin
  • /bin
  • /usr/sbin
  • /sbin
  • /Library/Apple/usr/bin

---

Expected Behaviour

Jekyll should run

Current Behavior

Can't run any Jekyll command

Code Sample

% jekyll --help

Traceback (most recent call last):
	21: from /usr/local/bin/jekyll:23:in `<main>'
	20: from /usr/local/bin/jekyll:23:in `load'
	19: from /Library/Ruby/Gems/2.6.0/gems/jekyll-4.2.0/exe/jekyll:8:in `<top (required)>'
	18: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	17: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	16: from /Library/Ruby/Gems/2.6.0/gems/jekyll-4.2.0/lib/jekyll.rb:195:in `<top (required)>'
	15: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	14: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	13: from /Library/Ruby/Gems/2.6.0/gems/jekyll-sass-converter-2.1.0/lib/jekyll-sass-converter.rb:4:in `<top (required)>'
	12: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	11: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	10: from /Library/Ruby/Gems/2.6.0/gems/jekyll-sass-converter-2.1.0/lib/jekyll/converters/scss.rb:3:in `<top (required)>'
	 9: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	 8: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	 7: from /Library/Ruby/Gems/2.6.0/gems/sassc-2.4.0/lib/sassc.rb:31:in `<top (required)>'
	 6: from /Library/Ruby/Gems/2.6.0/gems/sassc-2.4.0/lib/sassc.rb:31:in `require_relative'
	 5: from /Library/Ruby/Gems/2.6.0/gems/sassc-2.4.0/lib/sassc/native.rb:3:in `<top (required)>'
	 4: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	 3: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	 2: from /Library/Ruby/Gems/2.6.0/gems/ffi-1.14.2/lib/ffi.rb:4:in `<top (required)>'
	 1: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require': cannot load such file -- 2.6/ffi_c (LoadError)
	22: from /usr/local/bin/jekyll:23:in `<main>'
	21: from /usr/local/bin/jekyll:23:in `load'
	20: from /Library/Ruby/Gems/2.6.0/gems/jekyll-4.2.0/exe/jekyll:8:in `<top (required)>'
	19: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	18: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	17: from /Library/Ruby/Gems/2.6.0/gems/jekyll-4.2.0/lib/jekyll.rb:195:in `<top (required)>'
	16: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	15: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	14: from /Library/Ruby/Gems/2.6.0/gems/jekyll-sass-converter-2.1.0/lib/jekyll-sass-converter.rb:4:in `<top (required)>'
	13: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	12: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	11: from /Library/Ruby/Gems/2.6.0/gems/jekyll-sass-converter-2.1.0/lib/jekyll/converters/scss.rb:3:in `<top (required)>'
	10: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	 9: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	 8: from /Library/Ruby/Gems/2.6.0/gems/sassc-2.4.0/lib/sassc.rb:31:in `<top (required)>'
	 7: from /Library/Ruby/Gems/2.6.0/gems/sassc-2.4.0/lib/sassc.rb:31:in `require_relative'
	 6: from /Library/Ruby/Gems/2.6.0/gems/sassc-2.4.0/lib/sassc/native.rb:3:in `<top (required)>'
	 5: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	 4: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	 3: from /Library/Ruby/Gems/2.6.0/gems/ffi-1.14.2/lib/ffi.rb:3:in `<top (required)>'
	 2: from /Library/Ruby/Gems/2.6.0/gems/ffi-1.14.2/lib/ffi.rb:6:in `rescue in <top (required)>'
	 1: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require': dlopen(/Library/Ruby/Gems/2.6.0/gems/ffi-1.14.2/lib/ffi_c.bundle, 0x0009): missing compatible arch in /Library/Ruby/Gems/2.6.0/gems/ffi-1.14.2/lib/ffi_c.bundle - /Library/Ruby/Gems/2.6.0/gems/ffi-1.14.2/lib/ffi_c.bundle (LoadError)

[crispgm]

try update ffi to 1.14.2 with bundle update, and it would be solved.

[osvik]

Thank you @crispgm Could you please be a little more specific on how to update? I'm not a Ruby developer.

% bundle update
returns:
Could not locate Gemfile

[crispgm]

Thank you @crispgm Could you please be a little more specific on how to update? I'm not a Ruby developer.

% bundle update
returns:
Could not locate Gemfile

Jekyll should go with Bundler, you may refer to this tutorial https://jekyllrb.com/tutorials/using-jekyll-with-bundler/.

And after setting up the Gemfile staff, then execute bundle update.

[mkbaldwin]

@crispgm I get the same error as @osvik does even when walking through the tutorial you referenced.

$ bundle exec jekyll new --force --skip-bundle .
bundler: failed to load command: jekyll (/usr/local/bin/jekyll)
Traceback (most recent call last):
	30: from /usr/local/bin/bundle:23:in `<main>'
	29: from /usr/local/bin/bundle:23:in `load'
	28: from /Library/Ruby/Gems/2.6.0/gems/bundler-2.2.8/exe/bundle:37:in `<top (required)>'
	27: from /Library/Ruby/Gems/2.6.0/gems/bundler-2.2.8/lib/bundler/friendly_errors.rb:130:in `with_friendly_errors'
	26: from /Library/Ruby/Gems/2.6.0/gems/bundler-2.2.8/exe/bundle:49:in `block in <top (required)>'
	25: from /Library/Ruby/Gems/2.6.0/gems/bundler-2.2.8/lib/bundler/cli.rb:24:in `start'
	24: from /Library/Ruby/Gems/2.6.0/gems/bundler-2.2.8/lib/bundler/vendor/thor/lib/thor/base.rb:485:in `start'
	23: from /Library/Ruby/Gems/2.6.0/gems/bundler-2.2.8/lib/bundler/cli.rb:30:in `dispatch'
	22: from /Library/Ruby/Gems/2.6.0/gems/bundler-2.2.8/lib/bundler/vendor/thor/lib/thor.rb:392:in `dispatch'
	21: from /Library/Ruby/Gems/2.6.0/gems/bundler-2.2.8/lib/bundler/vendor/thor/lib/thor/invocation.rb:127:in `invoke_command'
	20: from /Library/Ruby/Gems/2.6.0/gems/bundler-2.2.8/lib/bundler/vendor/thor/lib/thor/command.rb:27:in `run'
	19: from /Library/Ruby/Gems/2.6.0/gems/bundler-2.2.8/lib/bundler/cli.rb:494:in `exec'
	18: from /Library/Ruby/Gems/2.6.0/gems/bundler-2.2.8/lib/bundler/cli/exec.rb:28:in `run'
	17: from /Library/Ruby/Gems/2.6.0/gems/bundler-2.2.8/lib/bundler/cli/exec.rb:63:in `kernel_load'
	16: from /Library/Ruby/Gems/2.6.0/gems/bundler-2.2.8/lib/bundler/cli/exec.rb:63:in `load'
	15: from /usr/local/bin/jekyll:23:in `<top (required)>'
	14: from /usr/local/bin/jekyll:23:in `load'
	13: from /Library/Ruby/Gems/2.6.0/gems/jekyll-4.2.0/exe/jekyll:8:in `<top (required)>'
	12: from /Library/Ruby/Gems/2.6.0/gems/jekyll-4.2.0/exe/jekyll:8:in `require'
	11: from /Library/Ruby/Gems/2.6.0/gems/jekyll-4.2.0/lib/jekyll.rb:195:in `<top (required)>'
	10: from /Library/Ruby/Gems/2.6.0/gems/jekyll-4.2.0/lib/jekyll.rb:195:in `require'
	 9: from /Library/Ruby/Gems/2.6.0/gems/jekyll-sass-converter-2.1.0/lib/jekyll-sass-converter.rb:4:in `<top (required)>'
	 8: from /Library/Ruby/Gems/2.6.0/gems/jekyll-sass-converter-2.1.0/lib/jekyll-sass-converter.rb:4:in `require'
	 7: from /Library/Ruby/Gems/2.6.0/gems/jekyll-sass-converter-2.1.0/lib/jekyll/converters/scss.rb:3:in `<top (required)>'
	 6: from /Library/Ruby/Gems/2.6.0/gems/jekyll-sass-converter-2.1.0/lib/jekyll/converters/scss.rb:3:in `require'
	 5: from /Library/Ruby/Gems/2.6.0/gems/sassc-2.4.0/lib/sassc.rb:31:in `<top (required)>'
	 4: from /Library/Ruby/Gems/2.6.0/gems/sassc-2.4.0/lib/sassc.rb:31:in `require_relative'
	 3: from /Library/Ruby/Gems/2.6.0/gems/sassc-2.4.0/lib/sassc/native.rb:3:in `<top (required)>'
	 2: from /Library/Ruby/Gems/2.6.0/gems/sassc-2.4.0/lib/sassc/native.rb:3:in `require'
	 1: from /Library/Ruby/Gems/2.6.0/gems/ffi-1.14.2/lib/ffi.rb:4:in `<top (required)>'
/Library/Ruby/Gems/2.6.0/gems/ffi-1.14.2/lib/ffi.rb:4:in `require': cannot load such file -- 2.6/ffi_c (LoadError)
	31: from /usr/local/bin/bundle:23:in `<main>'
	30: from /usr/local/bin/bundle:23:in `load'
	29: from /Library/Ruby/Gems/2.6.0/gems/bundler-2.2.8/exe/bundle:37:in `<top (required)>'
	28: from /Library/Ruby/Gems/2.6.0/gems/bundler-2.2.8/lib/bundler/friendly_errors.rb:130:in `with_friendly_errors'
	27: from /Library/Ruby/Gems/2.6.0/gems/bundler-2.2.8/exe/bundle:49:in `block in <top (required)>'
	26: from /Library/Ruby/Gems/2.6.0/gems/bundler-2.2.8/lib/bundler/cli.rb:24:in `start'
	25: from /Library/Ruby/Gems/2.6.0/gems/bundler-2.2.8/lib/bundler/vendor/thor/lib/thor/base.rb:485:in `start'
	24: from /Library/Ruby/Gems/2.6.0/gems/bundler-2.2.8/lib/bundler/cli.rb:30:in `dispatch'
	23: from /Library/Ruby/Gems/2.6.0/gems/bundler-2.2.8/lib/bundler/vendor/thor/lib/thor.rb:392:in `dispatch'
	22: from /Library/Ruby/Gems/2.6.0/gems/bundler-2.2.8/lib/bundler/vendor/thor/lib/thor/invocation.rb:127:in `invoke_command'
	21: from /Library/Ruby/Gems/2.6.0/gems/bundler-2.2.8/lib/bundler/vendor/thor/lib/thor/command.rb:27:in `run'
	20: from /Library/Ruby/Gems/2.6.0/gems/bundler-2.2.8/lib/bundler/cli.rb:494:in `exec'
	19: from /Library/Ruby/Gems/2.6.0/gems/bundler-2.2.8/lib/bundler/cli/exec.rb:28:in `run'
	18: from /Library/Ruby/Gems/2.6.0/gems/bundler-2.2.8/lib/bundler/cli/exec.rb:63:in `kernel_load'
	17: from /Library/Ruby/Gems/2.6.0/gems/bundler-2.2.8/lib/bundler/cli/exec.rb:63:in `load'
	16: from /usr/local/bin/jekyll:23:in `<top (required)>'
	15: from /usr/local/bin/jekyll:23:in `load'
	14: from /Library/Ruby/Gems/2.6.0/gems/jekyll-4.2.0/exe/jekyll:8:in `<top (required)>'
	13: from /Library/Ruby/Gems/2.6.0/gems/jekyll-4.2.0/exe/jekyll:8:in `require'
	12: from /Library/Ruby/Gems/2.6.0/gems/jekyll-4.2.0/lib/jekyll.rb:195:in `<top (required)>'
	11: from /Library/Ruby/Gems/2.6.0/gems/jekyll-4.2.0/lib/jekyll.rb:195:in `require'
	10: from /Library/Ruby/Gems/2.6.0/gems/jekyll-sass-converter-2.1.0/lib/jekyll-sass-converter.rb:4:in `<top (required)>'
	 9: from /Library/Ruby/Gems/2.6.0/gems/jekyll-sass-converter-2.1.0/lib/jekyll-sass-converter.rb:4:in `require'
	 8: from /Library/Ruby/Gems/2.6.0/gems/jekyll-sass-converter-2.1.0/lib/jekyll/converters/scss.rb:3:in `<top (required)>'
	 7: from /Library/Ruby/Gems/2.6.0/gems/jekyll-sass-converter-2.1.0/lib/jekyll/converters/scss.rb:3:in `require'
	 6: from /Library/Ruby/Gems/2.6.0/gems/sassc-2.4.0/lib/sassc.rb:31:in `<top (required)>'
	 5: from /Library/Ruby/Gems/2.6.0/gems/sassc-2.4.0/lib/sassc.rb:31:in `require_relative'
	 4: from /Library/Ruby/Gems/2.6.0/gems/sassc-2.4.0/lib/sassc/native.rb:3:in `<top (required)>'
	 3: from /Library/Ruby/Gems/2.6.0/gems/sassc-2.4.0/lib/sassc/native.rb:3:in `require'
	 2: from /Library/Ruby/Gems/2.6.0/gems/ffi-1.14.2/lib/ffi.rb:3:in `<top (required)>'
	 1: from /Library/Ruby/Gems/2.6.0/gems/ffi-1.14.2/lib/ffi.rb:6:in `rescue in <top (required)>'
/Library/Ruby/Gems/2.6.0/gems/ffi-1.14.2/lib/ffi.rb:6:in `require': dlopen(/Library/Ruby/Gems/2.6.0/gems/ffi-1.14.2/lib/ffi_c.bundle, 0x0009): missing compatible arch in /Library/Ruby/Gems/2.6.0/gems/ffi-1.14.2/lib/ffi_c.bundle - /Library/Ruby/Gems/2.6.0/gems/ffi-1.14.2/lib/ffi_c.bundle (LoadError)

I have ffi 1.14.2 installed:

$ gem list | grep ffi
ffi (1.14.2)

[mkbaldwin]

So, I tried a few things, and ended up installing ruby 2.7.2 via rvm. It downloaded and built ruby from source for arm64. Once I did that I was able to get jekyll running using bundler per the tutorial on their site.

So, perhaps there is an issue with the universal binary version of ruby shipped with OS X?

[crispgm]

So, I tried a few things, and ended up installing ruby 2.7.2 via rvm. It downloaded and built ruby from source for arm64. Once I did that I was able to get jekyll running using bundler per the tutorial on their site.

So, perhaps there is an issue with the universal binary version of ruby shipped with OS X?

It seems to be the reason. I forgot to mention that I am using Ruby installed from Homebrew.

[osvik]

This past weekend I couldn't install Homebrew 3.0.0 due to an error during the install. This is why I didn't tried the rvm option. I'm waiting for the 3.0.1...

It would be great if Jekyll could be installed in Big Sur + Apple Silicon following the easier instructions in the home page.

[osvik]

Upgrading to ruby 2.7.2p137 with Macports with rbenv and ruby-build has worked. I'm using the local install method.

[prsanjay]

Updating ffi and sassc in Rosseta enabled terminal has worked for me.

bundle update ffi sassc

[rfos]

Some issue for me! I Can't install Jekyll on Apple M1

[marko85to]

Same issues for me. I have Big Sur on Apple M1.

I have successfully run
gem install bundler jekyll

output:

Fetching bundler-2.2.13.gem
Successfully installed bundler-2.2.13
Parsing documentation for bundler-2.2.13
Installing ri documentation for bundler-2.2.13
Done installing documentation for bundler after 3 seconds
Fetching public_suffix-4.0.6.gem
Fetching addressable-2.7.0.gem
Fetching colorator-1.1.0.gem
Fetching eventmachine-1.2.7.gem
Fetching http_parser.rb-0.6.0.gem
Fetching em-websocket-0.5.2.gem
Fetching concurrent-ruby-1.1.8.gem
Fetching i18n-1.8.9.gem
Fetching ffi-1.14.2.gem
Fetching sassc-2.4.0.gem
Fetching jekyll-sass-converter-2.1.0.gem
Fetching rb-fsevent-0.10.4.gem
Fetching rb-inotify-0.10.1.gem
Fetching listen-3.4.1.gem
Fetching jekyll-watch-2.2.1.gem
Fetching kramdown-2.3.0.gem
Fetching kramdown-parser-gfm-1.1.0.gem
Fetching liquid-4.0.3.gem
Fetching mercenary-0.4.0.gem
Fetching forwardable-extended-2.6.0.gem
Fetching pathutil-0.16.2.gem
Fetching rouge-3.26.0.gem
Fetching safe_yaml-1.0.5.gem
Fetching unicode-display_width-1.7.0.gem
Fetching terminal-table-2.0.0.gem
Fetching jekyll-4.2.0.gem
Successfully installed public_suffix-4.0.6
Successfully installed addressable-2.7.0
Successfully installed colorator-1.1.0
Building native extensions. This could take a while...
Successfully installed eventmachine-1.2.7
Building native extensions. This could take a while...
Successfully installed http_parser.rb-0.6.0
Successfully installed em-websocket-0.5.2
Successfully installed concurrent-ruby-1.1.8
Successfully installed i18n-1.8.9
Building native extensions. This could take a while...
Successfully installed ffi-1.14.2
Building native extensions. This could take a while...
Successfully installed sassc-2.4.0
Successfully installed jekyll-sass-converter-2.1.0
Successfully installed rb-fsevent-0.10.4
Successfully installed rb-inotify-0.10.1
Successfully installed listen-3.4.1
Successfully installed jekyll-watch-2.2.1
Successfully installed kramdown-2.3.0
Successfully installed kramdown-parser-gfm-1.1.0
Successfully installed liquid-4.0.3
Successfully installed mercenary-0.4.0
Successfully installed forwardable-extended-2.6.0
Successfully installed pathutil-0.16.2
Successfully installed rouge-3.26.0
Successfully installed safe_yaml-1.0.5
Successfully installed unicode-display_width-1.7.0
Successfully installed terminal-table-2.0.0
Successfully installed jekyll-4.2.0
Parsing documentation for public_suffix-4.0.6
Installing ri documentation for public_suffix-4.0.6
Parsing documentation for addressable-2.7.0
Installing ri documentation for addressable-2.7.0
Parsing documentation for colorator-1.1.0
Installing ri documentation for colorator-1.1.0
Parsing documentation for eventmachine-1.2.7
Installing ri documentation for eventmachine-1.2.7
Parsing documentation for http_parser.rb-0.6.0
unknown encoding name "chunked\r\n\r\n25" for ext/ruby_http_parser/vendor/http-parser-java/tools/parse_tests.rb, skipping
Installing ri documentation for http_parser.rb-0.6.0
Parsing documentation for em-websocket-0.5.2
Installing ri documentation for em-websocket-0.5.2
Parsing documentation for concurrent-ruby-1.1.8
Installing ri documentation for concurrent-ruby-1.1.8
Parsing documentation for i18n-1.8.9
Installing ri documentation for i18n-1.8.9
Parsing documentation for ffi-1.14.2
Installing ri documentation for ffi-1.14.2
Parsing documentation for sassc-2.4.0
Installing ri documentation for sassc-2.4.0
Parsing documentation for jekyll-sass-converter-2.1.0
Installing ri documentation for jekyll-sass-converter-2.1.0
Parsing documentation for rb-fsevent-0.10.4
Installing ri documentation for rb-fsevent-0.10.4
Parsing documentation for rb-inotify-0.10.1
Installing ri documentation for rb-inotify-0.10.1
Parsing documentation for listen-3.4.1
Installing ri documentation for listen-3.4.1
Parsing documentation for jekyll-watch-2.2.1
Installing ri documentation for jekyll-watch-2.2.1
Parsing documentation for kramdown-2.3.0
Installing ri documentation for kramdown-2.3.0
Parsing documentation for kramdown-parser-gfm-1.1.0
Installing ri documentation for kramdown-parser-gfm-1.1.0
Parsing documentation for liquid-4.0.3
Installing ri documentation for liquid-4.0.3
Parsing documentation for mercenary-0.4.0
Installing ri documentation for mercenary-0.4.0
Parsing documentation for forwardable-extended-2.6.0
Installing ri documentation for forwardable-extended-2.6.0
Parsing documentation for pathutil-0.16.2
Installing ri documentation for pathutil-0.16.2
Parsing documentation for rouge-3.26.0
Installing ri documentation for rouge-3.26.0
Parsing documentation for safe_yaml-1.0.5
Installing ri documentation for safe_yaml-1.0.5
Parsing documentation for unicode-display_width-1.7.0
Installing ri documentation for unicode-display_width-1.7.0
Parsing documentation for terminal-table-2.0.0
Installing ri documentation for terminal-table-2.0.0
Parsing documentation for jekyll-4.2.0
Installing ri documentation for jekyll-4.2.0
Done installing documentation for public_suffix, addressable, colorator, eventmachine, http_parser.rb, em-websocket, concurrent-ruby, i18n, ffi, sassc, jekyll-sass-converter, rb-fsevent, rb-inotify, listen, jekyll-watch, kramdown, kramdown-parser-gfm, liquid, mercenary, forwardable-extended, pathutil, rouge, safe_yaml, unicode-display_width, terminal-table, jekyll after 29 seconds
27 gems installed

but jekyll new my-awesome-site returns:

Traceback (most recent call last):
	21: from /usr/local/bin/jekyll:23:in `<main>'
	20: from /usr/local/bin/jekyll:23:in `load'
	19: from /Library/Ruby/Gems/2.6.0/gems/jekyll-4.2.0/exe/jekyll:8:in `<top (required)>'
	18: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	17: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	16: from /Library/Ruby/Gems/2.6.0/gems/jekyll-4.2.0/lib/jekyll.rb:195:in `<top (required)>'
	15: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	14: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	13: from /Library/Ruby/Gems/2.6.0/gems/jekyll-sass-converter-2.1.0/lib/jekyll-sass-converter.rb:4:in `<top (required)>'
	12: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	11: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	10: from /Library/Ruby/Gems/2.6.0/gems/jekyll-sass-converter-2.1.0/lib/jekyll/converters/scss.rb:3:in `<top (required)>'
	 9: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	 8: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	 7: from /Library/Ruby/Gems/2.6.0/gems/sassc-2.4.0/lib/sassc.rb:31:in `<top (required)>'
	 6: from /Library/Ruby/Gems/2.6.0/gems/sassc-2.4.0/lib/sassc.rb:31:in `require_relative'
	 5: from /Library/Ruby/Gems/2.6.0/gems/sassc-2.4.0/lib/sassc/native.rb:3:in `<top (required)>'
	 4: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	 3: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	 2: from /Library/Ruby/Gems/2.6.0/gems/ffi-1.14.2/lib/ffi.rb:4:in `<top (required)>'
	 1: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require': cannot load such file -- 2.6/ffi_c (LoadError)
	22: from /usr/local/bin/jekyll:23:in `<main>'
	21: from /usr/local/bin/jekyll:23:in `load'
	20: from /Library/Ruby/Gems/2.6.0/gems/jekyll-4.2.0/exe/jekyll:8:in `<top (required)>'
	19: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	18: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	17: from /Library/Ruby/Gems/2.6.0/gems/jekyll-4.2.0/lib/jekyll.rb:195:in `<top (required)>'
	16: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	15: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	14: from /Library/Ruby/Gems/2.6.0/gems/jekyll-sass-converter-2.1.0/lib/jekyll-sass-converter.rb:4:in `<top (required)>'
	13: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	12: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	11: from /Library/Ruby/Gems/2.6.0/gems/jekyll-sass-converter-2.1.0/lib/jekyll/converters/scss.rb:3:in `<top (required)>'
	10: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	 9: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	 8: from /Library/Ruby/Gems/2.6.0/gems/sassc-2.4.0/lib/sassc.rb:31:in `<top (required)>'
	 7: from /Library/Ruby/Gems/2.6.0/gems/sassc-2.4.0/lib/sassc.rb:31:in `require_relative'
	 6: from /Library/Ruby/Gems/2.6.0/gems/sassc-2.4.0/lib/sassc/native.rb:3:in `<top (required)>'
	 5: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	 4: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	 3: from /Library/Ruby/Gems/2.6.0/gems/ffi-1.14.2/lib/ffi.rb:3:in `<top (required)>'
	 2: from /Library/Ruby/Gems/2.6.0/gems/ffi-1.14.2/lib/ffi.rb:6:in `rescue in <top (required)>'
	 1: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require': dlopen(/Library/Ruby/Gems/2.6.0/gems/ffi-1.14.2/lib/ffi_c.bundle, 0x0009): missing compatible arch in /Library/Ruby/Gems/2.6.0/gems/ffi-1.14.2/lib/ffi_c.bundle - /Library/Ruby/Gems/2.6.0/gems/ffi-1.14.2/lib/ffi_c.bundle (LoadError)

[slycke]

So I got Jekyll 4.2 to run natively on my M1 MPB!🎉

I'm not 100% sure I've captured all the steps below that made it work but it should be the most important steps.

Here's what I did:
From: sass/sassc-ruby#146 (comment)
(re)install gems giving arch issues with native extensions
gem uninstall sassc
gem install sassc -- --disable-march-tune-native
gem uninstall ffi
gem install ffi
Update bundler for good measure
bundle update --bundler
Add webrick because otherwise Jekyll won't run on Ruby 3.0 #8523
bundle add webrick
Make sure to rebuild everything. This threw some errors, I had to run this a few times before it worked.
bundle install --redownload
And now:
bundle exec jekyll serve
works! 👍

[pranjalworm]

I'm facing the same exact issue as OP on my M1 MacbookPro.

[fulldecent]

Blunt workaround:

rm -rf vendor
arch -arch x86_64 bundle install
arch -arch x86_64 bundle exec jekyll serve

[monfresh]

@pranjalworm If you're facing the same exact issue, it's because you are using the system Ruby that came preinstalled on your Mac. You should not be using the system Ruby. Instead, you need to install a version manager that can install a separate, and more recent version of Ruby. All the steps necessary to set up a complete working Ruby environment on a Mac can get complicated, even more so on M1 Macs, which is why I wrote a script that can automate the whole process for you.

For a more detailed explanation as to why you shouldn't use the system Ruby, and how to properly install Ruby on a Mac, read my definitive guide to installing Ruby gems on a Mac.