With what hardware? I have upgraded my 2009 MBP to OS X 10.9 Mavericks and it was a very bumpy ride with daily or hourly kernel panics. OS X 10.10 Yosemite was even more stable than that, but a bit slower in general.
Now my 2009 MBP runs OS X 10.8 Mountain Lion quite fine.
Ahh... How did you get Snow Leopard on that?rMBP 15". 2.6 GHz Intel Core i7, 16GB.
Hello, few months ago, people working at Genius Bar suggested me not to upgrade from Snow Leopard because there were still issues and problems with Mavericks. Is it safe to upgrade now?
rMBP 15". 2.6 GHz Intel Core i7, 16GB.
Seems highly unlikely an Apple employee would tell you to not upgrade. Something fishy here!