Apple IMac - HFS+ Formatted Drives

Troubleshooting HFS+ Formatted Drives/ - 27
HFS+ Formatted Drives
The hard drive in the iMac is formatted with HFS+ (also referred
to as Mac OS Extended format). It is important to note that Norton
Utilities version 3.5 is not compatible with HFS+ (or Mac OS
Extended format), and in fact, can destroy data on the hard drive.
Norton Utilities version 3.5.3 or 3.5.2 will not attempt to repair
a drive formatted with Mac OS Extended format and versions 3.5.1
and earlier cannot recognize that a hard drive is in Mac OS
Extended format and can result in hard drive corruption and loss
of all data on the drive.
Note: When diagnosing hard drive problems, it is important to
verify whether or not the customer may have used the wrong disk
repair software for their drive before assuming that the problem
is hardware related.