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Samsawna
User level: Level 1 (5 points)

Glitches and lag in Safari UI after the upgrade to latest MacOS 27 Golden Gate

How many of you are experiencing a lag on Safari after the latest upgrade to MacOS 27? Especially when you enlarge the tab into a full window? Glitches like when you swipe four fingers up to reveal all the windows, and then come back to Safari window, the dock pops up and down for no reason (I've enabled my settings to automatically hide the dock in full window), and other glitches of the same sort, added to it is a general lag and inconsistency in the Safari UI. Requesting Apple to please fix this please.

Posted on Sep 17, 2026 6:45 AM

3 replies

tiagordsx
User level: Level 1 (14 points)

Sep 22, 2026 6:18 AM in response to Samsawna

Here I am observing strange behaviors after the update (MacBook Air M3, macOS 27.0):


  1. The side bar is blinking while open;
  2. Page scrolling lost smoothness;
  3. Two processes ("Safari" and "Safari Networking") are using a lot of CPU and raising the temperature to more than 80 ºC. After closing Safari with Command+Q, everything goes back to normal.


Outside of Safari, opening Spotlight isn't as smooth as it used to be either.


I hope there is an answer from Apple to this.

Alpha-Centauri
User level: Level 1 (8 points)

Sep 26, 2026 2:50 PM in response to Samsawna

Same problem here. MacMini M2 Pro, Apple Studio Display, Magic Touchpad. APPLE FIX THAT SHI

Burrito-Dom
User level: Level 1 (8 points)

Oct 5, 2026 6:17 AM in response to Alpha-Centauri

Same probleme here, MBP 14in M2 Max (32gb) 26.6.2 (25G83)

Originally posted at discussions.apple.com/thread/256358976