Mac slow after installing Maverick

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My mid-2007 iMac is also suddenly noticeably slower, laggier, long pauses, etc. since installing Mavericks. Lots of space on the harddrive (upgraded a dead drive 8 months ago).

The memory usage most was startling to observe - I'm maxed out on this old machine at 4 GB, and am now sometimes finding that it is nearly all in use (or reserved)...

More than hour and still not up.

I've had one one incomplete boot as I killed it after waiting for about 10mins (held power switch), single user cycle took 30-45mins and tested my patience. The normal boot thereafter has yet to come up, 45 mins and counting... This comes after 3 weeks of running just fine on a mid-2010 iMac 21" with 16G RAM and 1Tb HDD (>600GB available free space)....

Wow, beats the crap out of Windows XP on boot up rates... Way to go OSX Mavericks, oh well maybe the hamster needs steroids to run a little faster and gets things moving in my trusty iMac :D

I can't even backup to my time capsule to restore OSX ML. Hope Apple fix this soon.

That MBP I was eyeing has gotta wait I guess.

I'll tell you how bad my 2011 iMac is....I have resorted to using my old Dell desktop, and it's working like a dream compared to this Apple fiasco.

My husband and I are having a debate as how to get this "thing" off of my machine. I want to nuke the whole machine and start over. He thinks he might just be able to remove Mavericks. I think mine is the better solution.

Well, I sent feedback to Apple and asked if they were reading the forums...like I don't already know the answer. I finally got my husband to actually sit down and look at my computer, and my activity monitor. He's the IT expert, but hasn't had much time before now. And, he's not having a bit of problem with Mavericks on his laptop In fact, he loves it. So I don't think he was taking my complaints seriously. I'm not a computer illiterate, but my "expertise" goes back to the days of Cobol programming, lol. However, we've had home computers for about 25 years.

He is of the definite opinion that the computer needs more memory, which we ordered last night from Amazon. It's 8 GB's worth of Kingston memory, which will give me a total of 12 when it is installed. I think my model will hold a maximum of 16 GB. He never gave memory a thought before, because he didn't realize, or forgot, that my iMac only came with 4GB. If you read the updated information on the Apple site, regarding Mavericks, they recommend 4GB. I'm starting to think they mean 4 available GB just for the OS!

I only have 4GB on my Windows laptop, and have no issues. And, I really don't do anything differently on my iMac. The iMac OS must really hog a lot of memory. And, actually, after about the first two months with my iMac, which was purchased in mid 2011, some strange things started to happen. And, I'd occasionally get the spinning wheel of death. In fact, it was acting quite a bit like a PC! I'm starting to think that all of those problems were memory related also. These machines really need to come equipped with more than 4GB. Or, you just need to be ready to install extra memory as soon as you get one.

Apple screwed up big time with this! You can't tell me that nobody knew that this update was going to cause issues. I'm starting to think we got it free because we were unknowingly made the beta testers.

I'll post an update as soon as my new memory is installed. I'm hoping it will be here by early next week, and that it resolves the issues.

I am about to call Apple again. After the maverick install on a 2011 iMac with 28Gig of RAM! I am also having the problem. And since I have updated I get the spinning wheel all the time. If I try to attach a file, that is on my desktop, it shows it blank for 30 seconds and then populates. First call to Apple they had me reset PRAM, Clear cache all over the place, remove startup items. on and on and on.

DID NOT FIX A THING!

This is some type of file structure problem they created with Mavericks. I am not sure what the issue is. My 2005 imac runs better than this machine now. APPLE FIX THIS.

So...I backup with Carbonite normally, just because it is in the cloud....but I am going to do a time machine backup. Got off the phone with Applecare, who admitted some people have had this problem. He said to just do a reinstall. This should correct the problem. If it does not...then he said I have to do a clean install and then migrate my stuff back in. I would not be too happy about having to do this. This is a TON of work, which I should not have to do because I update the OS. Too bad it was free, this would have probably kept me from doing it. Since there really was no reason to upgrade. I was thinking I would get a speed increase!!!! I will let you know how it goes and if it is corrected.

I have the same problem with both my 2011 iMac and my 2010 MacBook. Both are giving me the spinning wheel, longer loading times (even for simple things like putting in a symbol to a Word document, with no other apps open), and my hard drive is constantly making noise. Memory is definitely not an issue. I just thought to look on here and low and behold, other people are having the same problem. Is there any way to uninstall Mavericks?

Yep. Memory is my issue. 3.68GB used out of 4GB. Wish I'd never heard of Mavericks. I knew I was probably pushing it installing it on a Core 2 Duo.

That's just about how much memory my machine is using too! I'm not having some of the issues others are having, mine seem related to sluggishness and spinning wheels. I have a Quad core, 2011. I do wish I had looked to see how much memory I was using with the other OS upgrades. My memory should arrive from Amazon in the next couple of days. I'm hoping this solves the problem, or we will be nuking the computer next weekend and starting all over again.......I REALLY do not want to do that.

If I remember correctly, my mid 2011 iMac came with Lion. To tell you the truth, that OS always seemed a little more like a Microsoft product than an Apple product. It always had some strange glitches. And we had to nuke the machine, when it was only about 8 months old, to get it running right again. Not sure how much memory it was using back then. But, my guess is that my machine should have never been offered with 4GB of RAM.

I upgraded a few backs and am already regretting it. Loading problems, long pauses and running at a snails pace. Also iPhoto and iMovie cannot be opened as I get a notification that they are STILL getting updated.