I have two dropbox accounts, one basic and one professional. the professional one is on my desktop but i can only access the basic one via internet. i downloaded the installer but the icon in the dock won't open. i have a mac os running sierra version 10.12.6.
From what I understand you're trying to run the desktop app for your two inidividual accounts on your Mac computer - right?
If that's the case, note that it won't be possible for you to access both accounts through the desktop app as, currently, this feature is only for our Dropbox Business accounts. You can find more info about Dropbox Business if you like here: www.dropbox.com/business
More information on the feature itself can be found here: