There are many alternatives to X2Go for Mac if you are looking for a replacement. The best Mac alternative is TeamViewer. It's not free, so if you're looking for a free alternative, you could try Chrome Remote Desktop or DWService. If that doesn't suit you, our users have ranked more than 25 alternatives to X2Go and 18 are available for Mac so hopefully you can find a suitable replacement. Other interesting Mac alternatives to X2Go are NoMachine (Freemium), MeshCentral (Free, Open Source), MSP360 Remote Desktop (Free) and Xpra (Free, Open Source).
DWService is an open source project which offers a service that allows access to remote systems (Windows, Mac, Linux, Raspberry...) using a standard web browser - without any component required on the client side.
Xpra is 'screen for X': it allows you to run X programs, usually on a remote host, direct their display to your local machine, and then to disconnect from these programs and reconnect from the same or another machine, without losing any state.
No screenshots yet
Xpra vs X2Go opinions
pros, cons and recent comments
Works great for running applications remotly. Very stable and fast.
SaaS Remote management: remote desktop, shell, process and file transfer. It has an small-sized agent which is run as a service. These agents connect to our servers so that you can connect to them from anywhere just with a browser. No firewalls/NAT.
The best open source remote desktop software. It is an alternative of TeamViewer and AnyDesk, but open source. You have full control of your data, no concern of security. You can use my rendezvous/relay server, or set up your own, or write your own rendezvous/relay server.