Hi, 
I tried to install cadabra 2.2.9 on macOSMojave. 
The installation seems to work fine but I obtain the following error upon using cadabra2-gtk:
libc++abi.dylib: terminating with uncaught exception of type std::logic_error: Failed to create table runs libc++abi.dylib: terminating with uncaught exception of type std::logic_error: Failed to read port from server. Abort trap: 6
On the contrary, using cadabra2 does not produce errors.
Thank you for already for any information!