so it's the 2nd program i use suffering from backward incompatibility of the recent Qt version with mac os x 10.11.6.
as i'm not the only one blocked from updating my mac to 10.12+ by older, but still great performing specific hardware aka mac pro (cheesegrater).
this is important especially for professional mac pro users on pre black trashcan machines.
it would be a great opportunity to show loyalty to such customers by preserving backward compatibility of older enpass versions based on older qt versions to keep them aboard of the enpass ecosystem.