When you try to register QuickBooks for Mac, the Next button is grayed out. You can't proceed with the registration because the Next button cannot be clicked.
Intuit recommends more than one solution for this problem. The first solution may solve your problem, or you may need to try all of them to resolve the issue. For best results, perform the solutions in the order shown.
Check that you entered the license and product numbers correctly.
Note: If any of these folders appear to be missing see Access hidden user library files in Mac OS 10.7 (Lion).
From the Mac HD/Users/Username/Library/Preferences folder, delete the appropriate .plist file:
From the Mac Hd/Library/Preferences folder, delete the appropriate .plist file: