I know... it's blazing fast on my 2013 iMac.Just to be fair - I've got both an SSD and 8G RAM installed.
PsykX, if you don't have an SSD in there, it's highly recommended...
When you install a new OS, it indexes. That will temporarily slow the computer down until it finishes.I just installed the public beta on my nMP and the performance was absolutely dreadful! Very buggy, slow, won't even let me turn the wifi on for some reason.
I ran from it, frightened..