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I have iMac (Retina 5K, 27-inch, Late 2014) and after upgrade with Big Sur it begins to work very slowly and cooling system works hard and loud ALWAYS! Even I don't open any apps. Today I upgraded to 11.1 and it still works so bad( Why do you guys allow my old iMac to support this new OS?!
Try resetting the SMC How to reset the SMC of your Mac - Apple Support
Try resetting the SMC How to reset the SMC of your Mac - Apple Support
Why do you guys allow my old iMac to support this new OS?!
We are not Apple, but rather end users like you. You need to ask Apple that question.
Do you have any anti-virus or so-called "cleaning" apps installed? Any Torrent software?
Do you have an internal Fusion (rotational) drive? If so, that is a significant, but not necessarily the only reason your iMac is slow with Big Sur.
Yes, I have this type of drive 🤦♂️
Thank you Mike, but looks like it doesn't help( Cooling is still ALWAYS hard working(
FWIW my iMac has a fusion drive and Big Sur runs just as fast as El Capitan did when it was new. I've upgraded at every step in between and have never noticed a performance hit.
iMac Late 2014 and Big Sur works so bad(
