Hi, what could be the reason for update fail
Just for your information, I moved your topic into the RDM Mac Support forum.
Regarding your issue, we had problems with the auto update in RDM 126.96.36.199, this is why you encounter the message below.
This issue has been resolved, however, in your case, you would need to download the latest version manually
Although our various support queues will be monitored for emergencies, Devolutions' offices will be closed on June 24 and July 1st, 2019.