High Sierra Unbearably Slow

I have updated my MacBook Pro to the new developer beta and it has become extremely slow. Something as simple as opening Safari makes the fan turn on full speed. Any suggestions?

I have exactly same mbpr. I was working on fcpx on external monitor in clamshell mode and it was accumulating slowness. It went to the point of totally frozen. I restarted and same thing. I opened up the clamshell mode and the slowness went away instantly. I know high sierra has some problem in clamshell mode. I really don't think it is due to heat accumulation. My iMovie crashes and cannot even open in clamshell mode.

I have the same problem, the only way how to work with High Sierra on my MacBook Pro (Retina, 15-inch, Late 2013, nvidia) is not to use external monitor:-(

I was experiencing issues with unexpected reboots and extremely high usage of CPU and memory by mdworker on my late 2011 MBP, but I think I may have found the problem!! I went to Privacy in System Preferences and into the Privacy Tab. In Location Services, go to System Services at the bottom of the list and hit Details and turn off Frequent Locations.

Same issue with MacBook Pro (Retina, 15-inch, Late 2013).



Computer became unusable. Issue eleviated by unplugging from monitors. Computer still almost unusable for work because I'm a web dev that relies on screen space.



How does this sort of QA failure get through a company rich enough to hire a small country to QA stuff. Steve Jobs would be rolling in his grave.

After upgrading to High Sierra from Sierra, everything is slow, and I do not know what to do. My wonderful Mac mini became annoying mini. Any idea to fix this, wish I can turn back time.

I have same configuration and exact same issues.

Same for me. MacMini processor 2,7 GHz Intel i7, Memory 40 Go 1333MHz DDR3, HD Sata 500 Go.

To be able to read a message Mail takes about 8 mn !

Frequent problems with the mouse too...

It still slow for me without external monitor. Macbook pro 15" early 2013.

I second that. It's just unbelievable how could Apple release this "free upgrade". I was stupid enough to not resist the temptation and install it. I blame Apple nagging through App Store application for that.

I have an Early 2011 13-inch MacBook Pro w/ 16 GB Ram that also became extremely slow after upgrading to High Sierra. I was able to greatly improve performance via the following steps:

  1. Click Apple icon in upper left -> System Preferences -> Users & Groups -> Login Items
  2. Delete anything that you don't need to run at start. For me, it was the iTunes helper (I haven't used iTunes in years)
High Sierra Unbearably Slow
 
 
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