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 displaysClean 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 display
Get 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 Chip
Add memory to your iMac
Find out the type of memory your iMac uses and how to install additional memory.
Install memory in your iMac
Use external displays with your iMac
Learn how to connect to HDMI, get help with external display issues, and more.
Get help with external displays
Learn about Mac accessories
Set up your keyboard, mouse, and trackpad and learn about other Mac accessories.
Get help with Mac accessories
AppleCare Protection Plan for Mac
Get up to 3 years of repair coverage and expert technical support from Apple, the people who know your Mac best.
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