PowerBook G5

The PowerBook G5 is an unreleased model of the PowerBook line that had been anticipated to succeed the PowerBook G4. However, due to engineering challenges caused by the power consumption of PowerPC G5 processors, such a PowerBook model was passed over in favor of the MacBook Pro in 2006.

Prototypes
A PowerBook G5 prototype was thought to have been discovered in the collection of Hap Plain, but is believed to be an early prototype (also unreleased) of a dual-processor PowerBook G4. Another prototype was found using a power supply connector similar to that of a Mac mini G4 before MagSafe was adopted instead.