My MacBook Pro:
MacBook Pro (15-inch, 2.53 GHz, Mid 2009)
Memory: 8 GB
Currently run Snow Leopard 10.6.8 and also in a partition I have 10.8.x installed.
The most of my work is being done in 10.6.8, which I feel, it performs faster overall.
I feel 10.8 to be a bit heavier in a bunch of operations…, so I haven't make the full switch to it.
But time has come and I started considering to fully migrate my working environment to a newer OS X version.
The question is, will Mavericks operate faster than Mountain Lion on my MacBook ? Will my hardware be able to run 10.9 efficiently ?
MacOS – Upgrading macbook pro to mavericks – performance question
macbook promacosperformance
Best Answer
Yes. Mavericks has the same system requirements as Mountain Lion, but offers huge gains in energy efficiency, memory management, graphics performance, etc. And it's free!
If you're already in the process of moving over to Mountain Lion, I can't think of any reason not to jump directly to Mavericks instead.