I've held off updating my operating system from Yosemite (OS 10.10) because of worries over compatibilities with some important programs I use and and am not keen on re-purchasing. Just read someone had trouble with Sierra. In-between there is El Capitan (OS 10.11).
Want to make sure my inDesign CS4 (v. 6.0) will work on the next level up before I upgrade. Does anyone know? And I have the same question for my Photoshop CS6 (v. 13.0 x64). Thanks in advance for your advice!
That would be a very risky thing to do. Completely unsupported and not likely to work properly at all.