@hyun-shik in About opera there is this:
Versionsinformation
Version: 49.0.2725.64 - Beim Prüfen auf Updates ist ein Fehler aufgetreten (error occured proofing updates)
Update-Stream: Stable
Betriebssystem: Mac OS X 10.9.5 64-bit
and I just tried the oldest and youngest version 50.x; same thing , i get the message that I need macos 10.10
the strange thing is, that in software update of macos i don't get any option to update to a higher version of macos, like 10.10, if this has the actual VPN access.
Any ideas of how this could work ?