Yes. Linux has run on a mid-2011, 21.5-inch Intel iMac with Zorin OS 18, and a separate demonstration shows Linux Mint 21.3 Virginia on a 2011 iMac. In Sydney Butler’s Zorin setup, sound, Bluetooth, graphics, and networking worked; switching from Wayland to Xorg stopped browser-rendering glitches. Those results describe the specific machines in each example, not every Intel iMac.
Two Linux distributions on 2011 iMacs
Butler’s reported Zorin OS 18 setup used a mid-2011, 21.5-inch iMac with a quad-core processor, 8GB of RAM, Radeon graphics, and a 1TB hard drive. He used it for web browsing, office tasks, and DVD playback. A separate demonstration by Unboxing with Marty shows Linux Mint 21.3 Virginia running on a 2011 iMac, including a two-screen desktop setup.
The Mint example is a second distribution running on an iMac from the same model year, not a controlled comparison with Butler’s computer. The video is in English.
What worked, and the browser workaround
On his Zorin OS 18 installation, Butler reported that sound, Bluetooth, graphics, and networking worked without extra driver installation. He encountered glitches while a browser rendered pages under Wayland, a display system. After switching to Xorg, also called X11, the glitches stopped.
The iMac’s built-in optical drive was broken, so Butler played DVDs with an external USB DVD drive. His account also describes everyday web and office use, rather than a performance benchmark.
How the reported Zorin installation started
Butler created a bootable USB drive with Rufus, held Option (Alt) while starting the iMac, selected the USB drive, and proceeded through the installer. A bootable USB lets the computer start from the installer instead of its internal drive.
Pay attention to the installer’s disk choice: selecting an installation option that erases the disk can erase the selected drive. The USB boot and installation sequence is the one Butler reported for his iMac.
Check the hardware from a Live USB first
A Live USB starts Linux from a USB drive so you can try it before installing. One commenter in a discussion about older Macs suggested checking Wi-Fi, sound, the trackpad, and websites you use regularly from that session. That gives you a chance to try the functions that matter to you before proceeding with installation.
