Will my Mac run slow if I update it to Mavericks?
Solution 1:
Mine's the same as yours (MacBook Pro 2009 2.53 GHz) and I've definitely noticed it's slower than before.
Solution 2:
No, it should run faster.
I have installed Mavericks on three machines:
- A 2007 iMac
- A 2010 Macbook Air
- 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.
Solution 3:
I have a 2011 Air and it ran more slowly at first but after rebooting and it seems to run faster than Mountain Lion.