SSD showing incorrect usage

[sunbambino]

Hello on the board,

Could someone cast some light on this situation on a Macbook Pro (2017) running Mojave.

My drive is 1TB, my Apps use 60Gb, my Library is 231 GB, System is 10 GB and Users is 176GB.

This totals 477GB, but my drive reads that 783GB is used.

Have I missed something here or is my SSD likely misbehaving?

And if so is there anything I can do to rectify?

Cheerz

Sun B

 

[DeltaMac]

In the Get Info information window, included with Available, how much is "Purgeable" space?

 

[sunbambino]

"Purgeable" isn't showing there for some reason

 

[chabig]

Have I missed something here or is my SSD likely misbehaving?

And if so is there anything I can do to rectify?

With APFS, use of storage space has become more opaque. For example, if APFS makes a clone of a file, and then you delete that file, the clone still takes space. It's hard to tell what's going on, but almost certainly your SSD is fine and there is nothing you need to do. I would be curious to see a picture of About this Mac > Storage.

 

[DeltaMac]

What does your drive show in About This Mac/Storage tab? Give that a minute or two to update.

 

[sunbambino]

I see re APFS. This makes running a big App like Logic Pro quite uncertain coz I don't really know where I am re space. Just ran Disk Sweeper and it reports 479GB used

[automerge]1591972846[/automerge]
Just found the 'Purgeable' data via Disk Utility

[automerge]1591973045[/automerge]
So Disksweeper says something completely different to the Mac Disk Utility, and the Disksweeper estimate (469GB) is correct

 

[DeltaMac]

You can also try running Omni Disksweeper in what I call "expert mode":
Open your Terminal app. Type sudo, then add one space.
Right click on the Disksweeper app, and choose "Show Package Contents", then open the Contents folder.
Open the MacOS folder, then drag the OmniDiskSweeper file to your terminal window.
Press enter to start the command. You will be asked for your admin password. You will NOT see any characters as you type your password (it's a security feature), then press enter again. The Omni DiskSweeper window will appear. Choose your drive as usual and wait for the results. You may see some difference this time.

 

[sunbambino]

DeltaMac, what would I stand to achieve with this (slightly scary) Terminal routine? (Even the name 'Terminal' frights the pants off me). Would something simple like Clean my Mac achieve nothing?

 

[chabig]

It's a mystery, but I wouldn't worry about it. You're not short on space. Consider changing your mindset from “SSD Showing Incorrect Usage” to “I don’t understand where my space is being used” and then forget about it.

 

[sunbambino]

I suspect my machine has been resourced for crypto-mining purposes, is that a wildly paranoid guess?

 

[sunbambino]

After a lot of faffing around with PRAM and SMC resets, Terminal purges, Spotlight re-indexing, and even getting to the stage of wantng to wipe the drive and start again - ALL SOLVED with a simple re-install of Mojave. OSX rules!

 

[BrianBaughn]

Mojave will probably rebuild the mystery files over time and you'll end up where you started.