I have tried various versions of Joplin on my iMac Intel Core 2 Duo running 10.11.6 (el Capitan) and none of them have been able to work. The program opens, with the main window blank, and I get an error message in the Joplin helper.
I just tried the latest 2.7.15 and it's still the same. I have also not been able to find on the web or in this forum any indication of what the requirements of the application are, so I look at the info.plist file of the application package, and here it says 10.11 from what I understand it should work. Is that so or not?
P.S. mechanically translated message since I do not speak English, I apologize if I have not expressed myself correctly.