1 Reply Latest reply: Mar 17, 2013 2:43 PM by Eric Root
christian kuntner2 Level 1 (95 points)


strange problem here.

Mac pro 2008, 8 core.

OSX 10.7.5


If i want to boot (computer was off) i get the grey screen problem (hangs).

I do a PRAM reset >> it boots to another 10.6.8 ( have 3 HD's  with 10.6.8, 10.7.4 and 10.7.5).

then i choose 10.7.5 as boot-volume (system preferences) >> 10.7.5 boots normally.

If I do ea reboot (apple-menu) it reboots fine into 10.7.5.

If i shut down the computer >> start the computer again >> grey screen-hanging...


all other system running fine, also boot fine after a complete shutdown, only 10.7.5 behaves strange...


all voodoo (diskpermissions, hardwaretest, HD recovery) done, doesn't help.


Any help welcome.



Mac OS X (10.7.5), LP 9,Motu 896, MA-FW 410, MA-Lightbridge, amt8, BCF, BCR