Why is System Taking So Much Disk Space on Mac

Cache from Browsers, Mail, photos and the third-party apps Important files for correctly functioning of macOS operating system Ĥ. The operating system (macOS) that was used to start up the computer and launch applications Ģ. Generally, the files in the System storage can be anything that cannot be categorized into app, movie, picture, music or document, such as:ġ. And the System storage is confusing, makes it harder to know what is in the System storage. In About this Mac > Storage, we can see Mac storage are categorized into different groups: Photos, Apps, iOS Files, Audio, System, etc. Before we go to the solution, it is better to know well about the system storage on Mac.