Running Marathon on macOS Catalina does not work

[LambdaDigamma]

Platform
macOS Catalina Version 10.15 Beta (19A512f)

Issue
I freshly installed Marathon the recommended way on macOS Catalina Beta Version.
It seems to install without any error, but when trying to run Marathon via marathon I get the following error:
This copy of libswiftCore.dylib requires an OS version prior to 10.14.4.
[1] 13259 abort marathon run

I didn't dig into source code yet, but does anybody know a fast way to solve this error?
Thanks in advance!

[LambdaDigamma]

I resolved this error by switching Command Line Tools to use Xcode 11 Beta:
sudo xcode-select --switch /Applications/Xcode-beta.app/Contents/Developer

Please excuse the inconvenience!

[johndpope]

I'm seeing this error - although at some stage it was working fine.

cd "/Users/johndpope/.marathon/Scripts/Cache/-Users-johndpope-Downloads-frontpage-ios-app-FrontPage-src-Sync/" && readlink OriginalFile
/Users/johndpope/Downloads/frontpage-ios-app/FrontPage/src/Sync.swift
$ cd "/Users/johndpope/Downloads/frontpage-ios-app/FrontPage/src/" && /usr/bin/env xcrun --sdk macosx swift package --version
Apple Swift Package Manager - Swift 5.1.0 (swiftpm-14672.3)
$ cd "/Users/johndpope/.marathon/Scripts/Cache/-Users-johndpope-Downloads-frontpage-ios-app-FrontPage-src-Sync/" && /usr/bin/env xcrun --sdk macosx swift build -C /Users/johndpope/.marathon/Scripts/Cache/-Users-johndpope-Downloads-frontpage-ios-app-FrontPage-src-Sync/
[1/3] Compiling Sync main.swift
:0: error: invalid value '5.1' in '-swift-version 5.1'
:0: note: valid arguments to '-swift-version' are '4', '4.2', '5'
warning: '--chdir/-C' option is deprecated; use '--package-path' instead
💥 Failed to compile script

swift --version
Apple Swift version 5.1 (swiftlang-1100.0.38.29 clang-1100.0.20.14)
Target: x86_64-apple-darwin19.0.0

xcode beta 11

my bad - this fixes it
sudo xcode-select --switch /Applications/Xcode-10.1.app/Contents/Developer

marathon run Sync.swift --verbose
🏃 $ cd "/Users/johndpope/.marathon/Scripts/Cache/-Users-johndpope-Downloads-frontpage-ios-app-FrontPage-src-Sync/" && readlink OriginalFile
/Users/johndpope/Downloads/frontpage-ios-app/FrontPage/src/Sync.swift
$ cd "/Users/johndpope/Downloads/frontpage-ios-app/FrontPage/src/" && /usr/bin/env xcrun --sdk macosx swift package --version
Apple Swift Package Manager - Swift 5.0.0 (swiftpm-14490.62.2)
$ cd "/Users/johndpope/Downloads/frontpage-ios-app/FrontPage/src/" && /usr/bin/env xcrun --sdk macosx swift package --version
Apple Swift Package Manager - Swift 5.0.0 (swiftpm-14490.62.2)
$ cd "/Users/johndpope/.marathon/Scripts/Cache/-Users-johndpope-Downloads-frontpage-ios-app-FrontPage-src-Sync/" && /usr/bin/env xcrun --sdk macosx swift build -C /Users/johndpope/.marathon/Scripts/Cache/-Users-johndpope-Downloads-frontpage-ios-app-FrontPage-src-Sync/
[1/7] Compiling Swift Module 'ShellOut' (1 sources)
[2/7] Compiling Swift Module 'SwiftyJSON' (1 sources)
[3/7] Compiling Swift Module 'Alamofire' (17 sources)
[4/7] Compiling Swift Module 'Apollo' (43 sources)
[5/7] Compiling Swift Module 'Sync' (1 sources)
[6/7] Linking ./.build/x86_64-apple-macosx/debug/Sync
[7/7] Linking ./.build/x86_64-apple-macosx/debug/libMarathonDependencies.dylib
$ cd "/Users/johndpope/Downloads/frontpage-ios-app/FrontPage/src/" && /Users/johndpope/.marathon/Scripts/Cache/-Users-johndpope-Downloads-frontpage-ios-app-FrontPage-src-Sync/.build/debug/Sync "--verbose"
This copy of libswiftCore.dylib requires an OS version prior to 10.14.4.
/bin/bash: line 1: 38767 Abort trap: 6 /Users/johndpope/.marathon/Scripts/Cache/-Users-johndpope-Downloads-frontpage-ios-app-FrontPage-src-Sync/.build/debug/Sync "--verbose"
💥 Failed to run script
👉 This copy of libswiftCore.dylib requires an OS version prior to 10.14.4.
/bin/bash: line 1: 38767 Abort trap: 6 /Users/johndpope/.marathon/Scripts/Cache/-Users-johndpope-Downloads-frontpage-ios-app-FrontPage-src-Sync/.build/debug/Sync "--verbose"

going in circles

[LambdaDigamma]

You are right. After successful installation I wasn't successful in building and compiling a Marathon Script on Catalina either.

[jstewuk]

Installed without an issue but unable to complete helloWorld example. Tests also failing.
XCode11b6, Catalina beta "10.15 Beta (19A536g)". Haven't had time to chase.

[JohnSundell]

Hi everyone, please note that Marathon is being deprecated and will not be updated for macOS Catalina (at least not by me). Feel free to either debug this and submit a PR, or migrate your scripts to use SwiftPM directly (which is my personal recommendation).