When you try to install an Adobe product, you receive the message, "Case-sensitive drives not supported" in the Install Options panel. Or, you receive an error message such as the following:
Install the product onto an HFS+ or HFSJ non-case-sensitive drive.
To determine whether your drive uses a supported file system (like Mac OS Extended [Journaled]), open the Disk Utility application in your Applications/Utilities folder. The graphic below shows where you can find the drive format information. Click your drive and note of the Format type.
You cannot install Adobe products on a volume that uses a case-sensitive file system, such as HSFX (HFS+) or UFS. This limitation applies to both the startup drive as well as the drive onto which the software is installed.
Contact Apple Support to format the drive and make it case-insensitive, and then try to install the Adobe app.