Here is an easy way to sync multiple Dropbox accounts to one computer:
Start Automator. (Tip: To quickly start Applications press Command+Spacebar, Type the name & once found hit Enter!)
File>New and Choose “Workflow”
Locate “Run Shell Script” in the library list (Again, using the search feature saves time!)
Copy / Paste the following:
HOME=$HOME/Dropbox-personal /Applications/Dropbox.app/Contents/MacOS/Dropbox &
This will create a folder called “Dropbox-personal” in your home directory. You can change the path and folder name to your liking, but avoid spaces in the name!
Choose File Format: Application and save into your Application Folder.
You can create as many of these apps as you like.
For advanced users:
If you have moved your home folder away from the usual OSX location you need to set a specific path where you replace “$HOME/Dropbox-personal” with “/PATH/YOUR_DROPBOX_FOLDER”, adjust to suit your specific setup.