I run MATLAB r2018b on a MacBook Pro 2018 with 16 GB of RAM and a 2.7 GHz i7.
Every time I use MATLAB, after ~5,10 min of normal usage (basic tasks like plots or small vector computations), the CPU usage goes above 100% and the software becomes unusable, with an average of ~1.3 GB or RAM used. In this condition, I cannot save variables or plots and I have to force the termination of the session, but without seeing any error message.
After reading other MATLAB Answers, I can say that don't use Magnet and I disabled the Source Control and the auto-refresh of the Current Folder. The Java Heap Memory is set to a maximum of 4 GB. This issue occurs regardless if I am connected with Internet or not. Re-installing from scractch didn't solve the problem.
What could be the issue? The software alsways crashes after a short usage, I never experienced such problems with the r2016 version.
Thank you very much for your help.