On a Macbook Pro 256GB (Formerly 34GB free and running ESO on the system) Launcher will not run because it says there is not enough free space. The KB article calls for a Minimum 135GB on a Mac. I had to delete files to get to the 175GB free space as per the "Apple - Storage" report, and no ESO installed. It still will not run and calls for more space. Doing a further dive it looks like the OS is holding the freed up space as "purgeable". It shows 28GB free and ~150GB as purgeable.