· After the latest update of Roon Core the program does not start due to incompatibility with MacOS 10.15.8. Is there a way back to the recent version?
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· Roon Core on an iMac (late 2012) with MacOS 10.15.8 and no chance to upgrade OS further.
It looks like you’ve hit the new OS requirement wall.
As of the April 27 update, Roon officially requires macOS 12 or higher.
However, you can try using a temporary installer to get back up and running for the time being. You can find the relevant links and details in this release thread: Roon 2.65 and ARC 1.77 are live
Keep in mind:
Temporary Fix: This installer is a workaround, and long-term support for older macOS versions is not guaranteed.
Future-Proofing: Since your iMac (Late 2012) is officially capped at Catalina, you might eventually need to consider using OpenCore Legacy Patcher (OCLP) to install a newer macOS version.
Alternative: If your iMac is dedicated solely to being a Roon Server, switching the operating system to Linux (like Ubuntu or Roon OS via ROCK) is a great way to keep the hardware relevant without the macOS software restrictions.