Sonoma planning
Use this independent checker as a starting point, then verify official model support and known hardware issues.
Likely supported in official list
iMac 27-inch Late 2013
A frequent OCLP target. Review graphics, Wi-Fi, and Bluetooth caveats before choosing the newest macOS.
Confirm whether Sonoma is the right target before touching a production Mac.
Marketing names are not enough; use the model identifier from System Information.
Wi-Fi and Bluetooth can be a deciding factor on older hardware.
Some features depend on post-install root patches and current OCLP support.
Keep a backup and a recovery path before upgrading.
Short answers for Sonoma compatibility planning.