![]() ![]() ![]() Blocked the ability to run in Single User mode by pressing Command + S Blocked the ability to run in Verbose mode when you press Command + V Blocked the ability to run in the "target disk" mode (Target Disk Mode) when you press T (on compatible models) Power Mac G4 (AGP Graphics) and later G4 Power Macs PowerBook G4 and later G4 PowerBook models iMac (Flat Panel) and later G4 iMac models IMac (Slot Loading) and later G3 iMac models ![]() The following computers can use password protection: ![]() You can check if a firmware update is necessary for your computer. By default, this feature is disabled it can only be used on Mac OS X 10.1 or later, both with PowerPC and Intel Mac. Apple Open Firmware Update version 4.1.7 (to check yours, go to System Profiler> Hardware Overview> Boot ROM version) and later provide this feature. The Open Firmware Password application can be used to password protect a computer at startup. ![]()
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