displays a system requirement of “macOS 10.12+” for the macOS client (currently version 3.4.1).
when trying to install 3.4.1 on an old iMac, it says I “can’t use this program version with this version of macOS. Installed is 10.12.6, the client requires macOS 10.13 or higher”
I think that they will rather correct the “error” on the website, than make the client compatible for a macOS version that is unsupported by Apple since October 2019. Your best chance is to use an older version of the client. Even better would be not to use unsupported operating systems. Problems like that will only get more, the longer you use it. And let’s not talk about all the unpatched security holes, in a system that not has been updated for two years