I had a client recently that wanted me to use their Dropbox account so I could work easily within their system, but the problem was that I already had my own account and I didn't want to mix the two. After doing some research, I discovered that there is no official way to put multiple Dropbox accounts on one computer, but it turns out there is a bit of a loophole and it works pretty well. In fact, there are two of them.
Option 1 — Share It: The first option I tried was pretty straightforward. I went to the client's Dropbox on the web and determined which folders I needed to have access to. I then made a folder on my own Dropbox account titled "Client's Shared Folders." Back to the client's Dropbox I went and I shared the folders I needed to my personal Dropbox account, and then moved them into my "Client's Shared Folders" folder.
Although this option worked, it wasn't flawless like Dropbox usually is. I had a few sharing issues here and there when things didn't sync, so I went to option No. 2. That said, it was on a new computer at the time, so there may have been some bugs to work out in the process.
Option 2 — Create a New User Account: When option No. 1 didn't work, I decided to create a second user account on my Mac. To do so, I just opened up System Preferences in the Applications folder, unlocked the padlock with my Admin password and hit the plus sign next to users. I named the username after my client, and then logged into that new user.
Once I was in, I opened up the Dropbox app on the computer and signed into the client's account, just like Dropbox was never installed before. Now I had access to my personal Dropbox under my username, and the client's on the other — I just had to switch users to access one or the other.
Oh, and if I ever needed to pass files between the two, I created a shared folder that both used, that way I could just drop and go.