Your Mac might be running low on storage or resources.There could be a conflict with your system or browser cache.The YouTube app you are using on Mac could have been outdated or corrupt.Although there could be all kinds of reasons behind it, the following are common triggers and problems.
To understand the current situation, it is important to learn why YouTube is not working on Mac. How to Recover Downloaded YouTube Videos? App Solutions: YouTube Not Working on Mac Safari Solutions: YouTube Not Loading on Safari