Apple iMac G3 RAM Upgradation
The iMac G3 M4984 uses PC100 laptop-style memory. Some models support a maximum of 256MB while others support a maximum of 512MB, this is entirelly dependent on the firmware of the machine.
Is iMac RAM upgradeable?
iMac (24-inch, M1, 2021) has memory that is integrated into the Apple M1 chip and can’t be upgraded. You can configure the memory in your iMac when you purchase it.
Apple was so excited about bringing color to the Mac, it even made a professional Mac tower, the Power Mac G3, out of bright blue plastic. Professional users revolted, and Apple relented: The Power Mac G4 was gray, and even future iMac G3 models came in sedate non-colors like graphite and snow.