4525497-Apple Mac Pro Early 2009 Service Manual Repair Guide

5. Attempt to boot with original install media or from an external hard drive with compatible OS X installed. Verify the computer is able to successfully boot to the Finder.

6. Inspect if any memory error LED’s illuminated. Install 1 only known good compatible memory DIMM in memory slot#1. Verify computer boots without kernel panic or freeze.

7. Start with ‘Shift’ key to boot into safe mode. If computer still crashes during boot, place the hard drive into a good computer to access the Panic log. Check panic log to determine if an I/O interface has crashed, i.e. AirPort card, Bluetooth card, hard drive, optical drive etc

2009-04-08

Yes

Computer boots without kernel panic or freeze using external drive. Corrupt OS installed or damaged internal boot drive. Run ASD/Disk  Utility drive test and replace hard drive if test fails. Clean Install with compatible Mac OS X

No

Computer had kernel panic or freeze during boot. Go to step 5

Yes

Computer boots without kernel panic or freeze with only 1 DIMM installed. Re-install the customer memory (using optimized recommend congurations) until the at fault memory is identied. Use extra known good memory to identify the faulty memory module. Replace the faulty memory module.

No

Go to step 5

Yes

Kernel panic relates to I/O device crash. Go to step 7

No

Kernel panic is not relating to an I/O crash. Go to step 8

H03

M07

Mac Pro (Early 2009) Symptom Charts — Memory Issues/Kernel Panic and Freezes 39