macOS Monterey 12 - Couldnt Start Dropbox

If the previous steps didn't resolve the issue, you can try the following.

1) Stop the Dropbox desktop application (if needed)

• Click on the Dropbox icon.
• Choose Quit/Stop/Exit

2) Open your Terminal app (Located at /Applications/Utilities/Terminal)

3) Copy and paste the following lines into the Terminal, one at a time, and press RETURN after each one. PLEASE make sure you copy and paste these commands (don't type them by hand), as getting them wrong could cause some harm. You'll be prompted for your computer user's password (not your Dropbox password) after entering the first command. Keep in mind that the password field in the terminal will remain blank as you type your password. After you type it, just press ENTER. You'll know that these instructions complete normally once the initial line of text (called prompt) comes up again:

sudo chflags -R nouchg ~/Dropbox ~/.dropbox

sudo chown "$USER" "$HOME"

sudo chown -R "$USER" ~/Dropbox ~/.dropbox

sudo chmod -RN ~/.dropbox ~/Dropbox

chmod -R u+rw ~/Dropbox ~/.dropbox

Please note that once the prompt displays, the instruction completed the requested task, and is ready for the next command. If the command returns an error, or does not respond after an hour, you may want to try restarting your computer and try these steps again.

If you see an error after running one of these commands, let us know.

4) Restart Dropbox from Applications

Keep us updated on any progress.

DISCLAIMER: Please be advised that these steps include using the Terminal application. You should only try this if you are comfortable using Terminal, as incorrect usage can result in unwanted consequences. If you are not familiar with Terminal or run into any issues or errors, please let us know and we’ll take your case to ticket to troubleshoot directly.