Last Saturday, I got myself a new Unibody MacBook Pro. However it crashes once a day… By crashing I mean either a full freeze (mouse pointer unresponsive, closing the lid unresponsive,¬†ambient-light sensor¬†unresponsive) or a kernel panic. I didn’t find how to reproduce this issue, but in the last 4 days it has crashed once every single day.

Things I already tried:

  • Ran the Mac Diagnostics (Apple Hardware Test), both the standard and extended tests; it reports “everything OK”
  • Ran the Mac-ified memtest86+ for more than 9 hours; it reports “everything OK”
  • Erased the NVRAM and erased and reinstalled Leopard (and all software updates); the problem persists

Just for the record: The only software installed is Leopard, iStat Pro and Adium.

Needless to say, I’m not really happy with the Apple hardware. After trying the above steps myself, I called Apple Care with this issue. I must admit, the guy on the phone was very helpful and recognized that I tried pretty much everything I could to solve the problem. He gave me an incident number and told me to return the MacBook Pro to the store, since the laptop is only 4 days old…

Update 2008-11-20: Phoned the store today. They told me that they’ve seen this kind of problem before on other MacBooks which had their RAM upgraded. They were expecting a shipment of other RAM-modules tonight. So tomorrow I’ll bring it in and try that.

Update 2008-11-22: Brought the Mac back to the store; they replaced the 4GB of RAM by “better modules”:

Old New
BANK 0/DIMM0:

Size: 2 GB
Type: DDR3
Speed: 1067 MHz
Status: OK
Manufacturer: 0x0383
Part Number: 0x202020202020202020202020202020202020
Serial Number: 0x00000000
 BANK 0/DIMM0:

 Size: 2 GB
 Type: DDR3
 Speed: 1067 MHz
 Status: OK
 Manufacturer: 0x80AD
 Part Number: 0x484D54313235533641465038432D47372020
 Serial Number: 0x30090000
BANK 0/DIMM1:

Size: 2 GB
Type: DDR3
Speed: 1067 MHz
Status: OK
Manufacturer: 0x0383
Part Number: 0x202020202020202020202020202020202020
Serial Number: 0x00000000
 BANK 0/DIMM1:

 Size: 2 GB
 Type: DDR3
 Speed: 1067 MHz
 Status: OK
 Manufacturer: 0x80AD
 Part Number: 0x484D54313235533641465038432D47372020
 Serial Number: 0x100B0000

For the moment, this seems to solve the problem.

Update 2008-11-25: Still no crash or panic; looks good!

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