[NEEDS INFO] Automatic Updater For The Preview Release

Hello I have downloaded the preview on my mac and I ' ve tried to use the automatic updater but each time I type in the command in the terminal it says : ./xonotic-update.sh: No such file or directory
I' tried putting the the files in the xonotic folder, outside the folder and in a folder containing the xonotic folder but nothing works.
If someone could tell me it's supposed to work it would be really helpful.

./xonotic-update.sh: No such file or directory

This error message appears if you want to execute the file from a directory, where the file is not placed.
So move into the directory, where the file is placed, first.