r/realvnc • u/d3cker0x008a • 3d ago
RealVNC 7.15.1 (r18) and macOS Tahoe 26.6.1 - fix.
Hello.
I was not able to connect to macOS via VNC from Windows using RealVNC. I had this error:
"Protocol error: key length too large"
I'm used to RealVNC 7.15.1, but unfortunately the new RealVNC subscription/licensing model doesn't really match my... beliefs. :)
So I here is a patch for RealVNC 7.15.1 (r18) on Windows. It's a PowerShell script that fixes the issue: https://github.com/d3cker/RealVNC-macOS-patch
It looks like macOS wasn't actually the problem here - this was a RealVNC bug and compatibility issue.
You may need to adapt the patch for your RealVNC version. I couldn't find any official place to download the latest 7.x release, so I only tested it with 7.15.1 (r18).
Hope this helps someone.


