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I picked up the 2018 15" MacBook Pro recently, and right away I'm noticing the slightest amount of input delay on the keyboard. It doesn't always happen, but it's noticeable when it does - the typing cursor sometimes visibly lags behind when I'm typing.

It seems like it's happening a lot in Chrome specifically, though it happens in other applications. I could just be using Chrome a lot more than other applications.

Sometimes I can't tell if it's even input delay or just general slowness, for example when switching windows with CMD+TAB sometimes the window change animation is slower (it looks like I can briefly see the current window go from opaque to semi-transparent).

Has anybody run into the same problem, or does anybody have any ideas on how to verify whether this is happening? I notice it very clearly when I'm using my Mac, but since it's so unpredictable I'm skeptical of how reliable my observations actually are.

  • I think I remember a problem from long ago related to the Dock. Does anything change if you open /Applications/Utilities/Terminal and execute "killall Dock"? (It comes right back.) – Trellis Aug 4 '18 at 23:18
  • I held off on responding to see if this made a difference. I haven't noticed the delay since, so I think this fixed my problem! Feel free to post this as an answer :) – MattDs17 Aug 9 '18 at 5:21
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I think I remember a problem from long ago related to the Dock. Try opening /Applications/Utilities/Terminal, then executing "killall Dock" (It comes right back). This may just be a workaround and you might have to do it whenever you experience the problem.

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Try using Safari instead of Chrome for a bit. Literally, ensure that it is NOT in the Dock or Activity Monitor at all. I'm betting the problem goes away. (Yes, I'm serious unfortunately). Chrome is an intense memory hog and has internal memory garbage collection that tries to run when the machine is idle. If you happen to begin typing or interacting just as it begins garbage collection, everything will lag for a very short time. If your lag is greater than 3 seconds though, you have other problems.

You'll find many complaints that battery life is horrible when running Chrome, but is magically restored when running Safari. The two problems are intertwined.

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