Do you use Dropbox? If you ever change the user account name on your Mac then Dropbox will break and will display a fairly cryptic error message. Here are instructions on how to fix Dropbox.
- Click the Dropbox icon that appears in your Mac’s menubar, click the gear icon and then select Quit Dropbox
- Open Terminal and type in the following command. It will rename the Dropbox meta folder: mv ~/.dropbox ~/dropbox.old
- Drag this now visible dropbox.old folder from the top of your Home folder to the Trash
- Click on the Finder icon on the Dock
- Click on the Go menu and select Go To Folder.
- Type in /Library/
- Drag the DropboxHelperTools folder to the Trash and enter your Administrator password if prompted to complete this action.
- Empty the Trash
- Download and install the most current version of Dropbox.
- The Dropbox application should open and ask you to sign-in to your Dropbox account.