Fix Guide: Tahoe Finder QuickLook Memory Leaks

Symptom: Selecting files in Finder causes QuickLookUIService memory usage to climb indefinitely, eventually triggering "Your system has run out of application memory."

Why this happens

The Tahoe beta build of QuickLook has a regression where file previews (especially PDFs and HEIC images) are not purged from the RAM buffer after the preview window is closed.

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Fix 1: Force Restart QuickLook Services

1. Open Terminal.
2. Run the following command to kill the leaking processes:

killall QuickLookUIService && killall qlmanage

1. Finder will automatically restart these services as needed.

Fix 2: Clear the QuickLook Cache

1. In Terminal, run:

qlmanage -r cache

1. Then reset the daemon:

qlmanage -r