Question: [![enter image description here](https://i.stack.imgur.com/liZpX.png)](https://i.stack.imgur.com/liZpX.png)

![](https://i.stack.imgur.com/NHn5D.png)

I installed high Sierra a few months ago and nowadays there seems to be a problem with System Information.app, it always shows the disk usage wrong like for example System 40GB but it shows photos to be 0KB even though I have 19GB worth photos and DaisyDisk reports correct disk usage. 

I have tried booting into safe mode and rebooting, this persists after restarts 

Screenshot:
[![enter image description here](https://i.stack.imgur.com/BwsKp.png)](https://i.stack.imgur.com/BwsKp.png)
[![enter image description here](https://i.stack.imgur.com/MbKKj.png)](https://i.stack.imgur.com/MbKKj.png)

I have run this scan as root user not admin.

so how do fix this missing photo sizing in system information.app?

Answer: 
I recently ran into this - on my 500GB SSD, my free space was only 5% where I expected more like 75%. I found an answer in a [blog](https://www.jethrocarr.com/2017/11/06/macos-high-sierra-unable-to-free-disk-space/) that worked for me:

> 
> Apple state that they automatically remove local snapshots when disk space is low, but their definition of low is apparently only 5GB of free space remaining – not really much free working space in 2017 when you might want scratch space of 22GB for 1 hour of 4k 30FPS footage.
> 
> 
> On older MacOS releases, it was possible to disable the local snapshot feature entirely, this doesn’t seem to be the case with High Sierra – but it does appear to be possible to force an immediate purge of local snapshots with the following command:
> 
> 
> 

```
sudo tmutil thinLocalSnapshots / 10000000000 4

```

From the `tmutil` manpage:

> 
> 
> ```
> thinlocalsnapshots mount_point [purge_amount] [urgency]
> 
> ```
> 
> Thin local Time Machine snapshots for the specified volume.
> 
> 
> When **purge\_amount** and **urgency** are specified, tmutil will attempt (with **urgency** level 1-4) to reclaim **purge\_amount** in bytes by thinning snapshots.
> 
> 
> If **urgency** is not specified, the default urgency will be used.
> 
> 
>
I had a similar problem just now: Finder, "Get Info", and Disk Utility were all reporting 18GB free on a 250GB SSD that should have had plenty of free space. Under "About this Mac"->Storage, it reported 130GB of "System" usage. None of the space was listed as "purgeable", and macOS started complaining about lack of disk space.

I found a solution in [this Apple discussion thread](https://discussions.apple.com/message/32537764#message32537764). In my case, the problem was fixed by going to Time Machine Preferences and removing an old backup drive (that had long ago died) from the list of backup drives. Immediately, the available disk space on my SSD started being reported correctly as 120GB.