Apple, I gave you $4000 for a cutting-edge machine that works speedily, and your BS Safari 26 update has turned my M4 into a G4. DO BETTER
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macOS 15.7 & Safari 26 = laggy garbage
- Thread starter Q'iu T'ing
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I have macOS 15.7. I fixed this by going into recovery mode and reinstalling macOS. Don't worry about your files; macOS will reinstall while preserving all your data. Then Safari will be version 18.6 again and will work amazingly smoothly.
support.apple.com
How to reinstall macOS - Apple Support
You can use macOS Recovery, your computer's built-in recovery system, to reinstall the Mac operating system. Reinstalling macOS doesn't remove your personal data.