W.D. Yang Macintosh detractors will love to tell you that your iMac is a dead-end street with zero upgrade options. In reality, the iMac or for that matter, any Mac probably has as many upgrade options available as the standard beige PC in your office.
Macs don t support full-scale motherboard upgrade options.
But processor upgrades are available though generally not encouraged by Apple Computer itself. Processor upgrades for the Mac are significantly more expensive than other upgrade options and not always beneficial to your work. Like PCs, a straightforward processor upgrade may bring immediate performance gains in terms of raw CPU-based performance. If your applications benefit from using a G3 or a G4 processor more than additional memory or a faster video card, then a processor upgrade will probably make more sense. RAM upgrades Just like PCs, memory upgrades are available for your Mac.