How to Reduce System Space on Mac

Jasper1368 wrote:

I have more than 90GB of System space taken on my iMAC with only 11.75GB of Applications and all documents on iCloud / Google Drive. Can someone please help me to understand how I go about reducing this? I love my MAC but am so frustrated about how to go about reducing. I am still use Mohave because there isn't enough space to upgrade to latest OS. Can someone please help ??

Thanks In Advance

Empty your Trash — Delete files and folders on Mac - Apple Support

https://support.apple.com/guide/mac-help/delete-files-and-folders-on-mac-mchlp1093/mac

How to free up storage space on your Mac - Apple Support

https://support.apple.com/en-us/HT206996

See used and available storage space on your Mac

https://support.apple.com/guide/system-information/see-available-storage-space-syspf9b375b9/10.14/mac/10.15

User tip: "Other and What Can I Do About It ?"

https://discussions.apple.com/docs/DOC-5142

Try something like OmniDiskSweeper for a GUI to get a good look at itemized file size and location:

OmniDiskSweeper http://www.omnigroup.com/more