I've go two MacBooks:
- MacBook Air, 11-inch, 2013, running 10.11.6, 8GB RAM, 1.7 GHz Intel Core i7, integrated graphics
- MacBook Pro, 15-inch, 2018, running 10.13.6, 32GB RAM, 2.9 GHz Intel Core i9, Intel UHD Graphics 360 and Radeon Pro 560X
I have the same problem for both MacBooks but under slightly different circumstances: After my Mac is used for a while, the animations (eg. when opening a window or clicking an icon or scrolling a terminal window) on my macOS GUI become jerky and not smooth, and it takes a while to respond to a click or key press. This happens OS-wide, and not specific to any app.
This problem has been plaguing my Macs for a long time.
Why is this so and how can I improve this? I hope to get an answer from a computer architecture / "under-the-hood" perspective eg. Has it got to do with RAM, disk writes, GPU.
- My Mac usually starts off pretty fast. It's only after a while then it slows down
When my Mac is slow, and I check the Activity Monitor, there are cases where I get something like the following:
- 9.64 of 32GB memory in use, 0 swap used
- 94% CPU idle
- Disk Utility check - no issue
And it's still slow.
When I restart my Mac, the problem usually disappears, but the problem recurs after a while after I use the Mac.