iMac · 2015
iMac (21.5-inch, Late 2015)
Model identifier iMac16,1. Newest compatible macOS: macOS Monterey.
- Model identifier
- iMac16,1
- Introduced
- 2015
- Newest macOS
- macOS Monterey 12
- Family
- iMac
Download macOS for this Mac
macOS Monterey 12The newest macOS Apple supports on this Mac. See download options →
Older versions you can also install, if they are newer than the macOS this Mac shipped with:
- macOS Big Sur 11
- macOS Catalina 10.15
- macOS Mojave 10.14
- macOS High Sierra 10.13
- macOS Sierra 10.12
- OS X El Capitan 10.11
A Mac can't run a macOS older than the one it came with. macOS Recovery can reinstall the original version.
Part numbers
Also called order or configuration numbers. “xx” stands for a region code, such as LL (USA) or B (UK).
MK142xx/A MK442xx/A
Questions
What is the newest macOS for the iMac (21.5-inch, Late 2015)?
Apple lists macOS Monterey as the newest compatible operating system for the iMac (21.5-inch, Late 2015).
What is the model identifier of the iMac (21.5-inch, Late 2015)?
The iMac (21.5-inch, Late 2015) uses the model identifier iMac16,1. You can check yours in System Information › Hardware Overview.
Source: Apple – Identify your iMac model.