iMac Unusably slow after High Sierra Upgrade

So a perfectly great working machine that fails after a software update is a hardware issue...................... thanks

We have the same issue, after an update, the machine is basically scrap. will not talk to any of our NAS, takes forever to open anything up etc etc. Back to PC for us Apple have lost the plot.

I did all the above - and restored on a reformatted drive from a backup. It is still bad. The photos daemons do not seem to be the issue. Anything I start from disk (apps mainly gets up slow). I observed that the 3TB Fusion disk shows now up 2 separate things - a hard disk and an internal SSD. Is that a problem? Does the SSD get used or is left completely out?

I performed the upgrade on my iMac which now takes 45 minutes to start. I didn’t upgrade my laptop and it starts fine. I feel as though this answers the question about this horrible upgrade. Btw, laptop is mid 2010 & iMac is 2012.

Me as well. They say 1 in 10 complain. So the issue is bigger than apple knows.

I did everything in this thread. Finally reloaded Sierra and wiped out everything. I did lose some work unfortunately due to me not backing up as I always had.

It worked slowly for about a week (slow but not crawling), today it went into the ice-age retreat of slowness.

I did not reload any programs I had previous to crash like Adobe Premiere etc. I wanted to test the OS with NO add ons or additional programs.

This morning when I tried to read emails and the spinning apple circle of doom appeared. After several minutes the mountain screen backdrop, back to iceage action. Completely un usable.

I spent $2500. For this macbookpro 5 years ago. Thats 500 per year. Going back to Microsoft. I can deal with viruses but not systems.

Best of luck to all of you.

I had to erase everything and restore from a back up. Went to Apple store & they said because computers 5 years or older are considered “vintage”. My Macs always worked & I CHOSE to upgrade to new ones. This is ridiculous. I think they do not care to the same level they did for customer experiences.

Same issue. I didn’t update right away and once I finally did about a week ago.. my iMac is shot. This is complete BS!! Currently running Etrecheck. Hoping I can revert this useless update and pretend this never happened. Shame on Apple.

I finally updated, knowing deep down in my gut I shouldn’t have. My Mac was running perfectly but I got tired of the annoying update notification and updated. Now it takes almost 10-15 minutes for start up and everything takes forever to load. How can an update be more of a downgrade, I’m so ****** off and I use my Mac for music, I’ve been loyal to Apple since 08 and after iPhone and now my iMac going backwards after an update, I’m done.

I have a late 2013 i7 rerina macbook pro which I've upgraded yesterday from sierra to High Sierra.

Frankly, I've noticed my system gets slower after any OS upgrade, but this time it turn up useless. My mouse has a significant lag, the mac oftenly freezes and everything else runs as on an pentium 486 (for whom remember those).

is apple doing this deliberately? it it having the same ''performance adjustments with the battery life'' if so, why doesn't run normally while on charger? Why is this happening actually and what is the solution?

I feel like my trust in this company fades away...

So to get an SSD I'll have to take it to someone to do it? Why will I be happier? I'm not familiar with any of this so please help me out here.

I tried to backup from time machine before this POS was installed but it was a disaster. Something is wrong-wrong now. So I have wiped my computer and it's running High POS Sierra. Still have issues even typing this. Running EtreCheck report again. I forgot to post the first one but may have a better view since nothing is on this computer except for factory apps.

What a headache this has been.

I even came to the point I never ever buy Apple stuff anymore. And this is coming from a user that started with the Mac Pro 2008, and bought a new machine every 2 years after 2012 - same as with the iPhone. Now I just can't catch up financially anymore, and slowing down older, still very viable, macs and mobiles makes me lose money as a Pro-Mac user... I'm looking towards Android and the HP Z800 solutions now. Sorry Apple... the marriage is over.

Well Mr. Jones my wife's clean install of High Sierra on a 2013 iMac with 8 gb, i7 and the faster Iris video. It specs out much better than the old 2007. Yet that 2007 iMac running El Cap w i5, 6gb and a much slower graphics is way snappier in almost every task other than loading web graphics. The 2007 has all the stuff your answer is using to excuse Apple's poorly designed OS update; MS Office, iDrive, Sophos AV, and various handy ulitilities.

I don't need your standard horse manure about Windows. I've been using Macs since '84. This isn't normal. High Sierra has too many "...steaming pile of useless cool graphic BS" that slows down everything you do. Nothing opens with a snap. Nothing. Not even a cursor on a line of text. You have to wait for EVERYTHING. I'm definitely going to back her up. Most likely just to Sierra. Works awesome on our daughters Mac Book.

I work for an industrial CAD/CAM software company. Sometimes we release a real stinker. Our clients have to backup to keep the machinery rolling. Apple should own up to it's failure or at least clarify the minimum requirements for installing High Sierra. Setting the minimum by the year is total BS. I'd say 12gb RAM minimum on High Sierra. And a video card stronger than Apple ever uses except on the expensive graphic models. Macs are notoriously underpowered in the mid-range models.

BTW, this isn't Anne. This is Richard. I'm doing my computer thing on her station tonight.

Totally agree with Richard. The specs on my MacBook Pro read just fine in Etrecheck, but the reality is my laptop is very slow and laggy compared to running Sierra, and that was after a 100% clean install. I wish I could go back to Sierra but I don't have a copy that is clean enough to reinstall from. Is it possible to go back to my old copy and then do a clean install from there of Sierra?

toadc wrote:

It's also why this forum, helpful at times, is rarely my first choice when searching for solutions. EDIT: never my first choice unless it's the only choice.

Too bad and your loss as most of the regular contributors here, myself included, know much more about Macs and other Apple products than anyone who comes here claiming to need help only to question that help or come into these support communities to assigned other blame or make unsubstatiated claims and accusations, rather than get any help with their Mac issues.

You deprive yourself of knowledge from Apple/Mac users with 10-30 years of experience and knowledge!

The reason the many of the regular contributors stopped posting in this post, from what I have been reading, so far, is that the attitudes and tones of the users posting in this post has not been good and from what I’ve read, somewhat accusatory.

So, they left this conversation to leave those convinced of other ideas on their own, and maybe rightfully so.

Most of this post now is full of new users with a first time post trying to figure things out on their own, with other first time posters, in this post, now.

Just because of a continuing de-evolving conversation which has deviated from everyone here trying to get actual technical troubleshooting help, which is THE ONLY purpose to these Apple support communities.

Not finger pointing, arguing, debating, whining or complaining.

We are all users here to help to solve Apple product problems, not to field angry ranting, whining and/or complaining!

Many of us are all just regular volunteer users helping in these supoort communities, like any other users here and we do NOT work for Apple and we are NOT Apple customer service and these support communities aren’t Apple’s complaint forums.

It has nothing to do with your system! Just business tactics from Apple.

I have an older MacBook Pro and a 2017 iMac:

My MacBook Pro is now so painfully slow it's not worth using.

My iMac is noticeably slower but thankfully new enough to handle the new operating system - though I'm seriously considering going back a version (time is money in my business).

Bottom line, if you have a relatively new Mac, you may not notice a difference. If your Mac is older, Apple is giving you that extra bit of encouragement to buy a new Mac.

I used to love Apple but they keep pulling crap like this and it's annoying and very disappointing. That's putting it kindly!

I agree it is foolish to avoid updates & technological advancements altogether, however the main issue with High Sierra is:

BEFORE High Sierra, the Mac ran fine. No issues, no slow performance, etc. AFTER the High Sierra upgrade with no other installations or changes (no useless third-party utilities added, no installing 500GB of random stuff to just fill up your hard drive for no reason) - it runs NOT fine. It is slower and has more issues.

So if the Paint My Kitchen plugin didn't cause problems before the upgrade, how is that at fault now after the upgrade?