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As requested by readers, this page provides direct links to upgrade related Q&As for G3 and later Macs on a single page for your convenience. It is hoped that these Q&As will help you get the most out of your Mac whether it is many years old or brand new.
If you are not sure which Mac you have, look it up by Order Number, Model Number, EMC Number, Model Identifier or Serial Number with EveryMac.com's Ultimate Mac Lookup feature or the EveryMac app. If you need help, refer to Mac Identification.
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Upgrade Instructions - G3 & Later Notebook Macs:
Upgrade Instructions - G3 & Later Desktop Macs:
Have a question about your Mac that isn't directly upgrade related? Refer to EveryMac.com's main Q&As section.