On 6 Apr 2020, at 18:15, bagdiafa wrote: The socket that TextMate fails to bind to is used for the `mate` shell command, therefore it will work fine despite this error, though `mate` probably won’t be able to open files in TextMate. Though as to why it fails, that is pretty strange. It’s the first I hear of failure setting up the socket, and the code to setup the socket actually tests various conditions, like if it’s because there is already an old socket, etc. and that it shows “Undefined error” indicates the OS doesn’t even know why the `bind()` call fails. I would imagine that some kernel data related to sockets has gotten into a bad state, and probably the problem can be solved by a reboot (if you haven’t already found a solution, I realize this reply comes a little late).