mkdir Read-only file system error from a MAC

Good morning, I am having a general problem with mkdir function and I am looking for advice.

After connecting remotely to a network which I have a full access to and granted write-and-read permission (tested via Matlab and by hand), I cannot create new directories using the mkdir function which is odd. Weirdly, the fileattrib(cd) does not seem to change when I specify ('+w','a') which in theory should give writing permission to all users. Some people seem to have encountered similar problems and solved by running Matlab as administrator (see Run as administrator in Windows). However, I am using Matlab from my MAC and I cannot find such options.

Can someone please give advice?