Adobe Applications – Case-Sensitive Volumes Not Supported on MacBook Pro

macbook pro

I need someone to put this together in the most fool-proof way possible.

I recently reinstalled the OS on my Macbook Air 2014 (Yosemite) as I had a ton of useless files as it was acting super duper slow so now that I want to install Photoshop, Illustrator and InDesign (which my entire life depends on as I'm a design student) it gives me an error:
Installation on case-sensitive volumes is not supported. Please choose a different volume for installation.

I know this topic has been discussed before but tbh I didn't understand a thing going through them lol. So I know there is this thing called iPartition but I currently don't want to spend any money on apps and am more than happy to reboot my entire Macbook or pick a different OS if that helps.

Any thoughts?

Best Answer

Here's what Adobe has to say about this error.

It means you have to reinstall OS X.

enter image description here Reformat and Choose OS X Extended (Journaled) as in the image above.