Unreasonable slow on iMac 2012

xoxor

macrumors newbie
Original poster
Jul 24, 2016
6
0
Hello, I tried public beta on my iMac 2012. High Sierra is so slow that I can't even use it. Booting takes 2 minutes, opening stock apps takes around 30 seconds. Everything is so laggy, when I hit search field it takes few seconds until I can write into it. Im on El Capitan now and everything runs just perfect, my computer boots few second, opening apps is so fast that I cant even notice it.

I know that its beta, but why is so slow? My computer has more power than some new Macs - Macbook, curent MacBook Air etc. Hows beta running on that computers?
 

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gmanist1000

macrumors 68030
Sep 22, 2009
2,648
184
Running the public beta on an old 2011 MacBook Air, and I'm having the same results as you. Very slow. Not unexpected, because it's a beta, but I'm sure they'll iron the kinks out before release.
 

MacGizmo

macrumors 65816
Apr 27, 2003
1,408
771
Arizona
The first (Public) beta is always slow and buggy. If you can wait a few weeks, beta 2 will likely fix 90% of issues that pop-up in the initial version. If you can't wait, use Time Machine to roll back your install to Sierra (or whatever previous OS you had installed). You do have backups, right?
 

Rhinoevans

macrumors 6502
Oct 5, 2012
399
57
Las Vegas, NV
Running on a 2012 MacBook Pro. First beta was a little slow to boot compared to Sierra. All apps fine and opens fast. Beta 2 see's a fast boot and normal app speed.
 

teidon

macrumors 6502
Dec 22, 2009
413
181
I have noticed on my 2010 MBA that spindump and tailspin are running often eating considerable amount of CPU time. Anyone know any fixes, how to prevent them from running?
 

perezr10

macrumors 6502a
Jan 12, 2014
996
376
Monroe, Louisiana
It’s better if you wipe your Mac clean and set it up as new. I put High Sierra on an old 2010 MacBook Air and it was unusable until I wiped it clean. It was still slow and laggy but the crashes went from every 5 minutes to every 2 hours.
 

pet84rik

macrumors member
Apr 19, 2017
38
25
Prague, Czech republic
Same issue with MBP mid 2010 with i7. I tested this with noSSD drive and 4 GB of RAM, super slow, even opening "bout my mac" took 20 seconds. it was a bit better with HPFS, but nothing close to a 10.12 experience.

I am planning to test the newer beta release with 8 GB RAM and SSD in the same machine, I am hoping for some progress.
 

bradhs

macrumors member
Jun 5, 2010
97
36
I have noticed on my 2010 MBA that spindump and tailspin are running often eating considerable amount of CPU time. Anyone know any fixes, how to prevent them from running?
Yes, similar problem on a late 2016 MacBook Pro. Please open a bug report with apple.