feat: Enable multi-user support by allowing multiple instances of OpenKey for different mac users

[tnhoang]

Warning

This fix was written by Claude Code. It works on my mac. Use it with cautious

Summary

• Enable OpenKey to run simultaneously for different macOS users (Fast User Switching support)
• Change instance detection to only prevent duplicate instances per-user rather than system-wide
• Allow multiple instances at system level by setting LSMultipleInstancesProhibited to false

Changes

Modifies the duplicate instance detection logic in both the main app (ModernKey/AppDelegate.m) and the helper app (OpenKeyHelper/AppDelegate.m) to check the UID of running processes using proc_pidinfo. Previously, the app would terminate if any instance of OpenKey was running on the system. Now it only terminates if another instance is running under the same user.

Files changed:

• Sources/OpenKey/macOS/ModernKey/AppDelegate.m - Updated instance detection to check process UID
• Sources/OpenKey/macOS/ModernKey/Info.plist - Set LSMultipleInstancesProhibited to false
• Sources/OpenKey/macOS/OpenKeyHelper/AppDelegate.m - Updated instance detection to check process UID

🤖 Generated with Claude Code