Most people describe macOS 27 Golden Gate as faster than Tahoe. Yet one of the most active threads in the first week is about scrolling: pages that stutter, trackpad momentum that feels jittery, and a scroll that some users describe not as choppy but as "heavy," different from how inertial scrolling felt on Tahoe and Sequoia.
It doesn't happen to everyone, which makes it maddening to troubleshoot. Here's how to narrow down what's going on with your Mac and what's worth trying while Apple sorts it out.
What users are reporting
Across launch-week threads, a few patterns stand out:
- It's most noticeable on 60Hz displays. Several owners of MacBook Air models, which have 60Hz screens, report jitter on the built-in display that they don't see on a high-refresh external monitor.
- It's not only 60Hz. Others see no difference after moving to a 120Hz display, including on high-end Mac Studio and MacBook Pro setups.
- Apple's own apps are often mentioned as the worst.
- Mouse wheels make it more obvious, particularly with third-party mice.
- Low Power Mode oddly helps for some people on 60Hz MacBook Airs, reducing the jitter considerably.
Some also report the problem existed throughout the beta, so it isn't simply a last-minute regression.
Step 1: Rule out indexing
For the first days after upgrading, Golden Gate builds a new semantic Spotlight index, and Photos and Mail re-index too. That background work competes with the interface for resources and can make everything, including scrolling, less smooth.
Open Activity Monitor and sort by CPU. If mds_stores,
mdworker_shared, spotlightknowledged, or
photoanalysisd are near the top, judge scrolling again after a few nights
with the Mac plugged in. Our Spotlight indexing guide explains how to help it finish.
Step 2: Check your display's refresh rate
Go to System Settings > Displays, select each display, and look at Refresh Rate.
- MacBook Pro with ProMotion: it should be set to ProMotion. If it's fixed at 60 Hertz, scrolling will look less smooth than it should.
- External monitors: make sure the highest rate the monitor supports is selected. Cables, adapters, and docks can silently limit a 120Hz or 144Hz monitor to 60Hz. Test with a direct cable if you can.
- Scaled resolutions: running a display at a "looks like" resolution that isn't its native scale makes the GPU render a larger frame and scale it down, which costs performance. Try the default resolution to see if scrolling improves.
Step 3: Separate the input device from the system
Scroll the same long page three ways:
- With the built-in trackpad.
- With the arrow keys or Page Down.
- With your mouse.
If only the mouse is choppy, the issue is how scroll events from that device are handled. Mouse wheels send coarse steps, and macOS smooths them less than trackpad input.
- Update or reinstall your mouse's software (for example, a manufacturer's companion app), and check whether it has a smooth scrolling option.
- If you use a scroll utility, such as Mos, BetterMouse, or Mac Mouse Fix, update it. Some users say these utilities improve things considerably. Note that some mouse utilities broke other features on Golden Gate, so check for macOS 27 versions.
- Remove old scroll or mouse utilities you no longer use. Two tools both modifying scroll events can make things worse.
If even arrow-key scrolling stutters in Apple's apps, the problem is in rendering, not input.
Step 4: Reduce rendering load
Golden Gate's refined Liquid Glass relies on the GPU for blur and refraction effects, and scrolling content underneath glass toolbars and sidebars means those effects are recalculated constantly.
- Turn down Liquid Glass in System Settings > Appearance, toward the tinted end.
- Or turn on Reduce Transparency in System Settings > Accessibility > Display, as a test. If scrolling becomes noticeably smoother, the glass effects are a factor on your hardware.
- Close GPU-heavy apps and tabs while testing, including browser tabs playing video.
Step 5: Safari-specific check
Safari has a hidden developer setting that caps page rendering updates near 60 frames per second. It's meant for testing, but it's worth confirming it isn't on.
In Safari, go to Settings > Advanced and turn on Show features for web developers. A Feature Flags section appears. Look for Prefer Page Rendering Updates near 60fps and make sure it's off.
For some users, this made no difference. It's a quick check, not a guaranteed fix.
Step 6: Why Low Power Mode might help
It sounds backwards, but some MacBook Air owners report Low Power Mode reduces the jitter on the 60Hz built-in display.
One plausible explanation: on a 60Hz panel, smoothness depends on delivering frames at an even rhythm, not just quickly. When the system's frame pacing is uneven, a steadier, more conservative rendering behavior can look smoother than a faster, irregular one. That's a theory, not a confirmed cause. If it works for you, it's a reasonable temporary workaround while plugged in or during long reading sessions, at the cost of some performance elsewhere.
Turn it on in System Settings > Battery > Low Power Mode.
Report it properly
If scrolling is still poor after indexing has finished and you've ruled out your display and input devices, it's likely a Golden Gate issue. Apple fixes what it can reproduce, so a good report matters.
Open Feedback Assistant and include:
- Your Mac model and display (built-in or external, with refresh rate)
- The input device (trackpad, Apple mouse, or third-party mouse)
- Specific apps where it's worst
- Whether Low Power Mode or Reduce Transparency changes it
- A screen recording, if you can capture it
The short version
- Wait until post-upgrade indexing is done before judging.
- Confirm refresh rate settings, especially ProMotion and external monitors.
- Test trackpad, keyboard, and mouse separately to isolate input from rendering.
- Try reducing Liquid Glass or turning on Reduce Transparency.
- On 60Hz MacBook Airs, Low Power Mode may reduce jitter.
- If it persists, report it with details. There's no Apple fix yet.