tl;dr When dragging windows around on my M1 iMac (running Ventura 13.5.2). I'm experiencing a graphics issue where the window lags behind the cursor. This only happens when I'm logged into both my personal and work user accounts. This issue emerged a couple months ago, under Ventura.
The details:
I often have two user accounts logged in, one for my personal stuff, one for work. Been working like this for a long time and generally it's been great. The iMac (8/8 core, 16GB memory) has always handled the workload very well.
In the past couple months or so, however, I'm experiencing weird lag in either of the accounts when logged into both of them, even if nothing taxing is really happening. Specifically, what I'm seeing is that when dragging windows around the screen, they lag behind the cursor. It feels like I'm dragging them through molasses or something. Otherwise it seems like things are fairly normal. I can launch Photoshop in well under 5 seconds, for instance. And *within* apps I don't see any huge issues.
I've checked Activity Monitor, and the processor usage and memory seem normal. There's a bit of swap being used, but that's not new.


The reason I can tell it's related to being logged into the two accounts is that when I log out of either one, the issue goes away.
What's weird is that, like I said, a few months ago I could be logged both accounts and everything was working quite smoothly, even with lots of apps open on both accounts.
The details:
I often have two user accounts logged in, one for my personal stuff, one for work. Been working like this for a long time and generally it's been great. The iMac (8/8 core, 16GB memory) has always handled the workload very well.
In the past couple months or so, however, I'm experiencing weird lag in either of the accounts when logged into both of them, even if nothing taxing is really happening. Specifically, what I'm seeing is that when dragging windows around the screen, they lag behind the cursor. It feels like I'm dragging them through molasses or something. Otherwise it seems like things are fairly normal. I can launch Photoshop in well under 5 seconds, for instance. And *within* apps I don't see any huge issues.
I've checked Activity Monitor, and the processor usage and memory seem normal. There's a bit of swap being used, but that's not new.


The reason I can tell it's related to being logged into the two accounts is that when I log out of either one, the issue goes away.
What's weird is that, like I said, a few months ago I could be logged both accounts and everything was working quite smoothly, even with lots of apps open on both accounts.
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