6 Replies Latest reply: May 14, 2009 3:11 PM by Lyssa
vjejjala Level 1 (0 points)
I tried upgrading the OS to 10.5.7 today on a two and a half year old MacBook Pro. On restart and install, the upgrade failed. Subsequent attempts at restart lead to an error message that begins:
panic(cpu 0 caller 0x001AC125): ~Version mis-match between Kernel and CPU PM~@/SourceCache/xnu/xnu-1228.12.14/osfmk/i386/pmCPU.c:638
Of course, I have no idea what this or the subsequent lines mean.

I have the Leopard OS X install DVD and a Time Machine backup on an external drive. Overlaid on the above error message, I get the "You need to restart your computer...." prompt irrespective of whether the install DVD is in the drive.

I would be grateful for suggestions on what I should do.

Can I reinstall Leopard from the DVD and try upgrading to the latest version of 10.5 afterwards? How would I do this?

Copious thanks and best wishes,


MacBook Pro, Mac OS X (10.5.7)