Follow-Up--
On Friday we noted that we had a problem with our MacBook Pro Core 2 Duo after installing Security Update 2007-005. The problem was fixed by removing all of our external devices and then running Disk Utility to fix a minor disk error. We have now used our updated Macs, including the MacBook Pro, over the Memorial Day weekend with no further problems.
Reader Gerald Millward wrote us about his persistent problem with what he calls the "fans of death," the problem we had with our MacBook Pro:
I've got three Macs, a 17" iMac G4, a 20" iMac G5 and a 15" Power Book G4. All three units did the double restart you described, but only the iMac G5 presented me with the "fans of death". In fact the iMac G5 has gone through the "fans of death" routine during the past three upgrades. That always makes me nervous. Thanks for your report.
We are not sure what causes this problem. We have not had a persistent problem with any of our Macs after updates but the "fans of death" have happened to us before. Usually, just restarting fixes the problem.
Taking precautions like running Disk Utility's repair disk and repair permissions functions and disconnecting all external devices before installing updates may help. We do that frequently but obviously not always. [Bill Fox]
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