All session types should have a startup timeout which will check that the session has moved past "starting" state within 30 seconds. Some do, but not all apparently (or at least not in all cases). At least we now detect SSH errors and report them to the client.

We currently do not free_ports(), but we should...
We should not re-use these ports immediately (just in case nx/xpra/vnc whatever does not set SOCK_REUSE) but we need to keep track of them and allow those to be re-used.

If there are too many ports reserved (threshold?) we can just clear the list and start again (we re-detect ports that really are assigned).

I install the OSX winswitch package and run xpra from it. I run the script that sets up the dynamic libs, etc. here:

/Applications/Window-Switch.app/Contents/Helpers/xpra

This script has the odd behavior of not working unless you run it from a parent dir of the script. Otherwise you get

$ /Applications/Window-Switch.app/Contents/Helpers/xpra
/Applications/Window-Switch.app/Contents/Helpers/xpra: line 77: /Users/troy//Applications/Window-Switch.app/Contents/Resources/bin/xpra: No such file or directory
/Applications/Window-Switch.app/Contents/Helpers/xpra: line 77: exec: /Users/troy//Applications/Window-Switch.app/Contents/Resources/bin/xpra: cannot execute: No such file or directory

I think the issue is at the top of the file

if [[ "$0" == `pwd`* ]] || [[ "$0" == "//"* ]]; then
    full_path="$0"
else
    full_path="`pwd`/$0"
fi