If you use Timers in the Clock app a lot, after a while the app may stop working and show a blank view. This is the result of a service hoarding old timers to its property list.
preferences
Hundreds of app preferences are hidden away in ~/Library/Preferences and elsewhere. What do they contain, how do they work, and how can they crash an app before it’s even running fully?
First we repaired disk permissions, until SIP made that impossible. Then we reset user permissions until Apple withdrew that advice. Next we ran repairHomePermissions in Recovery. Should you still use that?
Everything you need to know about Containers, Group Containers and Daemon Containers, providing a sandboxed Home folder for apps.
How to get the most out of System Settings, third-party alternatives, and what to do if you still can’t find the setting you need to change.
Repairing permissions has a long history in Mac OS X. The permissions concerned have changed over the years, and it’s no longer what it once was.
Introduction to property lists, used in many places as well as the mainstay of preference files. How to change them safely without risk of conflicts.
Why changing a property list in Preferences may not change that setting, and how you may not be able to throw the file away.
Causes include code signature errors, app translocation, damaged documents, and corrupted or incompatible preference file.
How to develop predicates, filters and styles interactively, then add them to Ulbow’s settings. And how to transfer those settings to another Mac.
The Eclectic Light Company 