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What email client are you using? Maybe there are masses of emails including all their pictures and attachments stored in the Library's Mail folder if you use Apple Mail since many years, especially with POP3. Or somewhere else in the Library if you use a different client. Airmail for example stores in Containers/it.bloop.airmail, Thunderbird stores in Mozilla...

I use Safari to get onto my iCloud mail.
I had previous issues with my MacBook Pro when using the Mail app. It did the same thing that's happening now but the "other" was all old mail.
 
I use Safari to get onto my iCloud mail.
I had previous issues with my MacBook Pro when using the Mail app. It did the same thing that's happening now but the "other" was all old mail.

Oh sorry, I just saw you already posted the whole Library and obviously most data is in "Application Support".

Maybe it's easier for you to just open the Library directly in the Finder.

When you are in the Finder and click on the Go menu the Library appears by holding the option key and then you can activate "Calculate all sizes" in the View menu by clicking on "Show View Options" to see the size of all folders too.

Screen Shot 2016-06-21 at 17.49.31.png Screen Shot 2016-06-21 at 17.52.32.png

Then you can just open and browse through "Application Support" to see what folders are the largest.

My whole "Application Support" folder is 7.54 GB and 6.85 GB of that is the MobileSync folder, what contains in my case only a single backup of an iPhone I think. Maybe you have some large backups stored in there or even from old devices that you don't own anymore.
 
Code:
sudo du -d 1 -x -c -g ~/Library/Application Support

Tried again, same thing came up..
[doublepost=1466545649][/doublepost]
Oh sorry, I just saw you already posted the whole Library and obviously most data is in "Application Support".

Maybe it's easier for you to just open the Library directly in the Finder.

When you are in the Finder and click on the Go menu the Library appears by holding the option key and then you can activate "Calculate all sizes" in the View menu by clicking on "Show View Options" to see the size of all folders too.

View attachment 637206 View attachment 637207

Then you can just open and browse through "Application Support" to see what folders are the largest.

My whole "Application Support" folder is 7.54 GB and 6.85 GB of that is the MobileSync folder, what contains in my case only a single backup of an iPhone I think. Maybe you have some large backups stored in there or even from old devices that you don't own anymore.

I tried this, cannot get Library to come up. I saw a library folder in Finder, clicked it and it was empty. Now I cannot figure out how I got to it.

I'm trying to figure out how to get to Application Support and I'm probably being stupid but if you guys could dumb it down a bit and send me steps I could probably find it.
 
Ackk... totally my fault. When there is a space in the path like that you have to put the \ escape character in there. So this will work. Sorry. :oops:

Code:
sudo du -d 1 -x -c -g ~/Library/Application\ Support
 
Yup iOS backups. Open iTunes preferences and go to this screen and delete the ones for devices you no longer own

Thank you thank you thank you thank you!

There's still 64GB but that is ok for now!
 

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