Ive tried all the steps listed above for freeing up space, and still my system is taking up 102 GB. I ALREADY PAY FOR ADDITIONAL ICLOUD STORAGE. it shows I have 10GB available through iCloud. still cannot seem to update my Mac book air since 2018.
I have not been able to update to DARKMODE or CATALINA cause my system takes up so much space. I've tried to delete all duplicated files/ docs/ and unnecessary apps. I have no TV VIDS/ITUNES MUSIC. Its all empty. my pictures are all on iCloud storage. email disconnected from app/accounts.