Don't Upgrade The RAM In Your New Apple iMac, Do This Instead
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M1 Mac RAM and storage can be upgraded after purchase, but it's not easy - 9to5Mac
iMac, 2021, 24-inch, Apple M1, 256GB SSD, 8GB RAM, Silver
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How To Upgrade Your iMac with an SSD (2023 updated) | Upgradeable Australia
iMac Intel 17", 20", and 24" 2006 SSD Upgrade Kit
Apple 24" iMac with M1 Chip (Mid 2021, Silver) MGPC3LL/A B&H