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Low Disk Space – System taking up 2.91 TB

My iMac has been increasingly unstable and the available hard drive space has been getting lower and lower.


I've been getting messages pop up about running out of system memory and having restart every few days. And my HD space dropped by around 10GB in a day or two.


When I open the Storage tab on About my Mac the chart shows most of the space is categorised as 'System'.


I have Dropbox installed and my work files are somewhere around 1.77TB within Dropbox, many of these are selected to Online only so the files physically on my local drive are around 900GB. I have a Box account with 114GB and other files like Mail downloads totalling 70GB.


Any ideas why System is so large? And where can I find the culprit that is hogging approx 1.5TB of space that should be available?


iMac spec/configuration:

iMac 27", macOS 10.12

Posted on Jan 10, 2020 9:51 AM

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Low Disk Space – System taking up 2.91 TB

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