Learn about memory in your iMac

Memory available to Mac OS X may vary depending on graphics needs. Minimum graphics memory usage is 256MB. 1GB = 1 billion bytes and 1TB = 1 trillion bytes; actual formatted capacity less. PVC-free external cables in North America only. Acoustics measured on standard 21.5-inch iMac systems with 3.06GHz Intel Core 2 Duo processors. Easily check which versions of mac OS, iOS, iPadOS, or watchOS are compatible with your Mac model or iDevice. Guide includes OS X 10.8.x to macOS 11.0.x.

Learn about the type of random access memory (RAM) and video memory (VRAM) in your iMac.

Add memory to your iMac

Find out the type of memory your iMac uses and how to install additional memory.

Macos Version 10.13.0

Turn your iMac on or off

Apple Macos Version For 20-inch 2008 2

Learn where the power button is on your iMac, and get help with issues during startup or shutdown.

Use external displays with your iMac

Learn how to connect to HDMI, get help with external display issues, and more.

Learn about Mac accessories

Set up your keyboard, mouse, and trackpad and learn about other Mac accessories.

Get AppleCare+ for Mac

With AppleCare+, you’re covered. Get accidental damage coverage and 24/7 priority access to Apple experts.

Have a question? Ask everyone.

Macos Version 10.13

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Apple Macos Version For 20-inch 2008 Free