Skip to content
Branch: master
Find file History
Fetching latest commit…
Cannot retrieve the latest commit at this time.
Type Name Latest commit message Commit time
Failed to load latest commit information.
El Duderino
OS X Screen Savers.key

Keynote deck and Xcode demo project for my talk at tacow on 2016-May-17.


  • Draw in bounds, not frame, because multiple displays with an offset arrangement can cause drawing to be shifted.
  • Use AVPlayerLayer to play videos, because AVPlayerView inhibits system sleep.
  • ScreenSaverDefaults, a subclass of NSUserDefaults, writes to ~/Library/Preferences/ByHost/. Use defaults -currentHost in Terminal to access preferences.
  • No Swift—Xcode 7 doesn't offer a Swift option when creating new screen saver projects. System Preferences loads bundles' dylibs just once, so different Swift versions cause problems. There's a recent radar for this.
  • Use a Run pre-action script for debugging—copies to /tmp/ and symlinks built .saver to ~/Library/Screen Savers/.
  • Use an Archive post-action script to create installer package. There's an excellent SO answer on OS X installers with details and links.

Other Screen Savers

You can’t perform that action at this time.