Connect multiple displays to your 27-inch iMac

You can connect up to two 4K displays or two 6K displays using the two Thunderbolt 3 ports on your iMac (Retina 5K, 27-inch, 2020).

Double-click the iMac Firmware Updater icon. Follow the onscreen instructions. When prompted, click Shut Down in the dialog box to shut down your iMac. Locate the programmer's button on the side of the iMac, to the right of the reset button. Transfer your data to your new iMac. It’s easy to move your files and settings from another Mac or PC to your iMac. You can transfer information to your iMac from an old computer—or from a Time Machine backup on a USB storage device—either wirelessly, or with an Ethernet cable and adapters.

Clean the nano-texture glass on your 27-inch iMac

Follow these guidelines to clean the nano-texture glass display on your iMac (Retina 5K, 27-inch, 2020).

Get to know the T2 Security Chip

The data on your iMac (Retina 5K, 27-inch, 2020) is encrypted by the T2 Security Chip.

Add memory to your iMac

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

Upgrade Imac G4 To Intel

Use external displays with your iMac

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

Learn about Mac accessories

Update Mac Graphics Card

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.

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Update Mac G4 Pro

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