My new mac may need replacing next week. What happens if I download my new Creative Suite but need n

I think you need to check your terminology. You can download as many times as you like. You can install as many times as you like. You can only activate on 2 devices at any given time, but you can deactivate at any point to free up your activations again. And assuming you were referring to installing on an external drive - no, won't work. The activation data is always stored on the internal system drive, and without it, the apps are of no use and won't function. Adobe apps must always be properly installed, but based on what I said, I see no problem here whatsoever.

Mylenium