I am running Ubuntu-Mate on a Pine64 ARM64 board. The OS appears to be Ubuntu 16.04 based.
I downloaded the latest crossover for Ubuntu and used the gdebi package installer graphical interface.
The package fails to install and I get an error: "Dependency is not satisfiable: libc6 (>= 2.11)"
It would appear that my system has 2.21 or 2.23 (forget which) of libc6.
I've tried the terminal install, the various terminal lines about add-architecture i386, "-f", etc.; no joy.
Searching the forums, I see an occasional mention of libc6, but not a newer version number.
Thanks, in advance, for any help.