Mac OS X 10.1: Computer Serial Number No Longer Appears in Software

Symptom

The computer serial number no longer appears in:

• Apple System Profiler
• About This Mac window

Note: On certain computers, in the About This Mac window, you can double-click the version text to reveal the serial number.

Solution

Verify that the most current firmware available for your computer is installed. Firmware updates are available from the Knowledge Base. Search for your specific computer or device model.

Mac OS X Update 10.1.3 resolves this issue. See technical document 106704, "Mac OS X: How to Update Your Software".

Prior to Mac OS X 10.1.3, you may reset Parameter RAM (PRAM). See technical document 2238 "Macintosh: How to Reset PRAM and NVRAM" for instructions.

Note: The serial number may be restored for some but not all computers. If, for example, your computer's logic board had been replaced under warranty service, the serial number would not be retrievable by these methods.

	Related Documents
	106506	Mac OS X: Start up From Mac OS 9 to Install Firmware Updates