Retro Mac CPU Upgrade: Putting the “Power“ in PowerBook!

Apple’s products these days have more or less become impossible to upgrade. But it wasn’t always that way, as this mid-90s Mac PowerBook 540c demonstrates. Sources: 540c PPC sticker image: “PowerPC Portables,“ Macworld, November 1995. MacUser, May 1997. NUpowr upgrade card photo: In-box NUpowr upgrade photo: “New & Notable,“ MacUser, May 1997. SeeWorld MonsterDrive page, 1997: :// FWB Hard Disk Toolkit CD-ROM photo: Quadra 605 photo: : PowerPC Upgrade Card photo: : “More PowerBook 5300 Woes,“ Macworld, Fe