macOS Tahoe Performance Regressions and Typing Delays
I'm using a late 2021 16" M1 Max MacBook Pro with a 10-core CPU, 32-core GPU, 64GB RAM and 2TB storage. I updated to macOS Tahoe about three days ago now and have been experiencing a plethora of issues, mainly with the Liquid Glass overhaul that has caused a significant performance regression in everyday navigation throughout MacOS' UI. It should be noted I am not using VPNs and any peripherals.
I'll copy the bug report I sent to Apple, but this first part regards the typing delay and auto-completion list pop-up when using Scrivener or any app that utilizes TextKit from Apple.
There is a noticeable 1-1.5s second delay when the text suggestions or completion popup appears in text fields across macOS 26 (Tahoe), including in Apple’s own TextEdit and third-party apps such as Scrivener.
After testing, the issue is directly linked to the “Reduce Motion” accessibility setting in System Settings → Accessibility → Display.
When “Reduce Motion” is enabled, characters and pop up appear with a long lag or freeze before they animate in.
When “Reduce Motion” is disabled, the delay disappears and the popup and characters appear instantly.
This did not occur in macOS 25 (Sequoia). The issue appears to have been introduced with the new Liquid Glass UI animation system in macOS 26.
Steps to Reproduce:
Enable “Reduce Motion” in System Settings → Accessibility → Display.
Open TextEdit (or Scrivener).
Start typing several words that triggers the text suggestion/completion popup. This happens on scriptwriting mode or anything that uses the auto-complete function, showing a list of possible suggestions.
Observe a delay (~1–1.5s) before the respective characters pressed on the keyboard appear on screen.
Disable “Reduce Motion” and repeat — the popup appears instantly.
Expected Result:
Popups should appear promptly regardless of motion settings, matching behavior on macOS 25 (Sequoia).
Actual Result:
When “Reduce Motion” is enabled, popups animate with a visible delay/freeze, interrupting typing flow.
Notes:
Occurs on multiple Macs (Intel and Apple Silicon).
Reproduces in both Apple’s TextEdit and Scrivener (which use NSTextView).
Related to recent animation system changes in macOS 26 (Liquid Glass overhaul).
The issue was discussed with the lead developer of Scrivener, who mentioned this issue is an Apple bug NOT a Scrivener/third-party bug that needs to be fixed from their end as it happens on several Macs operating on Tahoe that have reduce motion turned off.
Animations feel choppier, especially when swiping up with three fingers to view all apps (or pressing F3 on my MacBook Pro), but also when using Stage Manager, performance takes a massive hit -- the animation for activating Stage Manager, switching between apps and viewing all apps in Stage Manager feels choppier and sluggish when compared to Sequoia, where everything was buttery smooth. My MacBook heats up (which has never happened) when using Stage Manager, and when it's turned on, navigating apps feels slower and not as snappy.
Resizing windows and apps on MacOS (both Apple native apps and third-party software such as Word, Powerpoint, Adobe, etc.) feels like I'm using a 10 year old machine. The animations and transitions lack the fluidity to match the 120hz ProMotion display of my MacBook, dropping below 60hz sometimes which is incredibly jarring and distracting. Scrolling through apps, especially in Apple Music, feels jittery and choppy when compared to apps like News, where everything is incredibly smooth.
Is there anything I can do to fix these prevalent issues?
MacBook Pro 16″, macOS 26.0