I haven't run fixdisk for over 2 years. Sloppy I know. I'm not aware of any problems - but of course that is the problem in a way. Anyway, I'm now on macOS Catalina 10.15.7 and I find Telnet has gone and I can't yet discover a way of getting it back. Has anyone in a similar position been able to run fixdisk and if so, how?