Every time I update my Hackintosh (P5WDH mobo) with the latest version of Mac OS I lose USB 2.0 speeds (all ports go to 1.1 speeds) and my system refuses to completely shutdown. The fix:
Delete AppleHPET.kext from /System/Library/Extensions
USB is flying and my systems sleeps and shuts down!
Quick and dirty:
Using Finder, copy the Kext to the desktop or somewhere as a backup (or you can use OSX86Tools too). Better be safe than sorry!
sudo rm -r /System/Library/Extensions/AppleHPET.kext
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AWESOME! You rock! I was trying to figure this out. THANK YOU!!!
Hey! that’s great! I had such problem, and i couldn’t find a right solution! but this way worked great for me! It was so importaint, cause i have alot of external HDDs. My mobo is asus P5w64pro, system 10.5.8
Thanx!!!
Thank you so much.
not only has usb speed increased, but also editing stuff in itunes has become faster.
Whoohoo thanks!
Before this fix, Disk Utility was taking 2 hours to write a 3.8 G image to USB stick, now it’s down to about 10 minutes.
On 10.6 reporting works thanks dude you are amzing
this is for google
slow USB and unresponsive USB ports and no USB2 connection on 10.6 snow leopard and shutdown errors
This hack still works with 10.6!?! Wowza. My little hack still running 10.5.8 like a champ.
man thanks works like a charm, before my laptop didnt shut down and i didnt know it was still running and i just put it in the bag and it would heat up, then i noticed this and googled it with no help found ur post and works like a charm keep up the good work.
Dude, saved me a ton of time – this was bugging me forever, and my iPad syncs were slow!
Thanks for the fix!
[...] figured it was time to figure out the root of the problem. A quick google search brought me to this site, and what proved to be a quick and easy fix to my problem. If you are too lazy to click through, [...]
That’s the best asnewr of all time! JMHO
Yep it works…. 10.6.6
Hola gracias por la info, pero aparte de no haberme funcionado ahora le cuesta apagarse 5 minutos y otros 5 encenderse.
He intentado copiar el archivo a su ubicacion original y me dice que turutu jejejej vammos que no se puede copiar a dicha carpeta
10.6.5
Placa asus p5k
Gracias de todas maneras
cd ~/Desktop
sudo -s
mv /System/Library/Extensions/AppleHPET.kext .
rm -rf /System/Library/Extensions.mkext
rm -rf /System/Library/Extensions/Caches/ && rm -rf /System/Library/Caches/update_dyld_shared_cache -debug -force -root /
defaults write /Library/Preferences/com.apple.windowserver Compositor -dict deferredUpdates 0
reboot
go to bios and enable hiSpeed mode for usb > F10
result = 0
echi don’t watched
reboot
go to bios and change to FullSpeed mode > F10
result = 0
usb watched but with low speed writing.
summary: result 0
Hi there, tricky done and USB are right working under 10.6.3, i still have the shutdown/restart issues since this machine hangs when it should switch off…. any other chance to fix this issue??
Thx!