Today my Mac wanted me to upgrade it to Mavericks. I'm hesitating because it is a bit old (Mid 2009 MacBook Pro) and I don't want things to run slow. I'm currently using 10.8.5 and it is OK. I have a Core 2 duo (2.53 GHz) with 4 GB of RAM.

What do you recommend? How was your experience?

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    Not sure it helps, but in terms of general work, I haven't noticed a huge improvement in speed on my quad-core early-2012 MBP, but I do think there has been some. I have noticed that animations seem more smooth and responsive. – bassplayer7 Oct 23 '13 at 20:39

Mine's the same as yours (MacBook Pro 2009 2.53 GHz) and I've definitely noticed it's slower than before.

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    Are there specific tasks you experience to run slower or is it a more overall feeling? – nohillside Oct 24 '13 at 11:11
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    i have exact same computer. it is not what you just feeling that slow but physical computation on this new OS seems too heavy lifting even under intel SSD. {iMac 27' 2012, Macbook Air 13', Macbook Pro 2009 2.53 user} – Yoon Lee Feb 22 '14 at 12:04

No, it should run faster.

I have installed Mavericks on three machines:

  1. A 2007 iMac
  2. A 2010 Macbook Air
  3. A 2012 Mac Mini

All models are displaying noticeable speed improvements. Mavericks also freed up a substantial amount extra hard drive space on all my devices.

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    couldn't agree more, mavericks really is faster. the only thing I've noticed is when switching between spaces i see a very small stutter motion, nearly noticeable, probably fixed with updates tho :) – Macmaniman Oct 24 '13 at 1:10
  • Speed improvements as compared to 10.8, I assume? Also compared to older OS's like 10.6? – Joost Oct 24 '13 at 20:32
  • Yes. I've observed speed increases along with each OS update on my older machines. – Bryan Luby Oct 24 '13 at 21:21
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    I have upgraded my macbook yesterday. Everything runs slower than before. I don't know why! – lvarayut Oct 25 '13 at 10:59

I have a 2011 Air and it ran more slowly at first but after rebooting and it seems to run faster than Mountain Lion.

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    Whenever the fans spin up on my 2012 Air, I know something's going on. In the first 24 hours after my upgrade, it rebuilt the Time Machine and Spotlight indices as well as performing several other database upgrade/reindex tasks I assume were required by the upgrade. It didn't really impact me, but I bet that's where your "more slowly at first" came from. – zigg Oct 24 '13 at 12:59

It's a lot slower for me on an iMac 2011.

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protected by Daniel Oct 24 '13 at 13:02

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