this is now supported in the latest Royal TSX beta. Please give it a try and let us know if it works for you!
You can get the beta here is always: https://www.royalapplications.com/go/kb-ts-mac-downloadbeta
This has now been rolled out in Royal TSX 4.1.
Make the Settings for Connect with Options (Ad Hoc) in TSX persistent. This means the Settings for ask for credentials and Console/Admin Session should be saved.
Best regards René