System data taking up 80% of all my Mac Mini SSD - Happened since two days ago. How to delete the junk added?

[Phat^Trance]

This has happened the last two days, the system data have bascially filled up my entire mac mini ssd the last 2 days. Nothing new have been installed since a few weeks ago, and no changes been made. Anyone knows how to fix this?

Reboot dont help. When i check the activiitymonitor, it seems that its "kernel_task" that has the most writing to the SSD.

Im on Seguoia 15.1

UPDATE: it seems to be com.apple.mediaanalysisd that causing this. Is it possible to disable this task?

 

[Phat^Trance]

Are there any free applications that i can install on my Mac that removes these files?

 

[Fishrrman]

Download "DiskWave".
It's small and free.
Get it here:

DiskWave Homepage

Once you have it, put it into the applications folder and launch it.
You should "see what to do" right away.

Look at the list on the left.
Click on any item, and it will show you what's using up your space.
There is a choice to select largest items first.

 

[algernonpule]

I'm having a similar issue: 20+ GB of files created since updating to macOS 5.1. I have filed a bug report with Apple, suggest you do the same (if you have not already done so).

- Edited to add: the Feedback Assistant number is FB15725684.

 

[algernonpule]

I installed Public Beta 2 of macOS 15.2 yesterday evening, and the problem has gone, so it looks like Apple have resolved this issue.

 

[Eriamjh1138@DAN]

Onyx is a free tool that runs the built-in utilities for MacOs.

 

[navaira]

I installed Public Beta 2 of macOS 15.2 yesterday evening, and the problem has gone, so it looks like Apple have resolved this issue.

My hopes are low. There’s the same thread in the Sonoma forum. (My System Data is mere 119GB on a 1TB drive.) Just tonight I deleted stuff and my free space went from 230 GB to 360 GB to 263 GB within one hour. I wonder whether any of those numbers is actually correct.

What I would like to know is why my Preboot volume is 23 GB. (DaisyDisk screenshot)

 

[gilby101]

What I would like to know is why my Preboot volume is 23 GB. (DaisyDisk screenshot)

Something wrong with DaisyDisk. On my Intel iMac:

According to DaisyDisk: Preboot 8.3 GB, System disk 8.6 GB
According to Disk Utility: Preboot 2.37 GB, System disk 10.74 GB

Also drilling down into DD's System disk is not what I would expect. Generally Daisy Disk does very well with the data structures on the 2 parts of the system disk, but not here.

I believe Disk Utility.

 

[gilby101]

Whoops - duplicate - please ignore

 

[navaira]

Something wrong with DaisyDisk. On my Intel iMac:

According to DaisyDisk: Preboot 8.3 GB, System disk 8.6 GB
According to Disk Utility: Preboot 2.37 GB, System disk 10.74 GB

Also drilling down into DD's System disk is not what I would expect. Generally Daisy Disk does very well with the data structures on the 2 parts of the system disk, but not here.

I believe Disk Utility.

Oh, interesting, I didn’t know I could even find it in Disk Utility! Preboot 6.61 GB, system disk also 10.74 GB. Is VM (10.74 GB) the same as Macintosh HD (10.74 GB)?

System data is now 176 GB. Last night – 132 GB. What actually sits in there, apart from APFS+ snapshots? I was thinking of doing a clean install of everything (the audio plugins that have about 300 licence codes will be fun…) but if I’m just going to end up with 176 GB but fresh that doesn’t appeal to me a lot…