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).
Learn how to connect multiple displaysDouble-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).
Find out how to clean your displayGet to know the T2 Security Chip
The data on your iMac (Retina 5K, 27-inch, 2020) is encrypted by the T2 Security Chip.
Read about the T2 Security ChipAdd memory to your iMac
Find out the type of memory your iMac uses and how to install additional memory.
Upgrade Imac G4 To Intel
Install memory in your iMacUse external displays with your iMac
Learn how to connect to HDMI, get help with external display issues, and more.
Get help with external displaysLearn about Mac accessories
Update Mac Graphics Card
Set up your keyboard, mouse, and trackpad and learn about other Mac accessories.
Get help with Mac accessoriesGet 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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