There was a problem installing “Mac OS X”. Try Reinstalling.

If you get this message after trying to clean install Lion from a USB drive (the install for me seemed to hang on my i7 MBP), you can try this as it worked for me:

1.  Power off the machine.

2.  Unplug the USB stick and power.

3.  Replace the USB stick, but in a different USB port.

4.  Hold down CMD-OPTION-P-R keys and turn the machine on (hold them until the machine reboots itself for a second BONG sound.)  This resets the PRAM, if you want to google it ;)

5.  Hold down Option and select your USB installer.

Should bring you to the familiar language selection screen.

Hope that helps.

PS-Hey Apple.  I applaud the diskless install, but why not let me choose clean install to begin with?  Restarting and “upgrading” just broke crap.  I broke more crap trying to get a fresh install.  Not easy.


#1 Jeffrey on 08.10.11 at 23:32

Thanks you! It worked for me when installing for iMac 8,1 with clean install.

#2 technohermit on 09.08.11 at 07:28

Glad it worked, thanks for visiting!

#3 Rasmus on 09.18.11 at 09:05

Dude awesome…Thanks a lot:-)

#4 technohermit on 09.18.11 at 09:45

No problem, thanks for visiting!

#5 javi on 09.24.11 at 02:43

WORKED for me too installing iOsx Lion 10.7 on my macbook air 2008 … nice trick bro! THANKS A LOT, i was having trouble finding the solution and you came with this.. yeah i fkn love u! lol