I have finally been able to run and install Mountain Lion 10.8.2 on my Acer Aspire M5 laptop, and let me tell you, my laptop is flying fast!
The only thing is that I am unable to use my fn controls on my keyboard. meaning I cant change the brightness on my laptop.
The only fn buttons that DO work are:
fn+F4 = Puts the laptop to sleep
fn+F6 = Turns off screen (In case you are using HDMI and both screens aren't on)
fn+F7 = Turns touchpad off
fn+F8 = Mutes sound
fn+F9 = Turns off keyboard backlight
fn+Up arrow = Volume up
fn+Down arrow= Volume down
The brightness control hotkeys are fn+Left for higher brightness and fn+Right for lower brightness.
I have tried the app called "Shades" but it sometimes makes my screen flash randomly from low brightness to the highest brightness i've ever seen on my laptop.
Here is my specs:
Acer Aspire M5-581T-6405
Mountain Lion OSX 10.8.2
Processor Name: Intel Core i5-3337U
Graphics Card: Intel HD Graphics 4000
RAM: 6 GB
Display: 15.6" HD widescreen CineCrystal™ LED-backlit display (1366 x 768)
P.s. I have another issue with not being able to upgrade from 10.8.2 to 10.8.4
I have the 10.8.4 combo update file and when I install the update I get kernel panics that say:
Kernel Extensions in Backtrace:
and then when I reinstalled 10.8.2 again (fresh install) and I update to 10.8.4 from the update file, I am able to boot up in safemode (with -v -x) mousepad everything works, but I am unable to boot up normally?
Thanks for your help