Run cpulimit with the -p flag using the process ID: cpulimit -p 19628 -l 40 Get Dropbox’s Process ID: ps aux | grep Dropboxġ04.7 2.3 xxxxxxxx xxxxxxxx ? R 4:07PM 15:47.12 /Applications/Dropbox.app/Contents/MacOS/Dropbox So it seems that the only way to fix it, will be to reduce the size of your shared Dropbox folder.
Dropbox computes a hash of all files that it's going to sync, it uses it both to determine if they changed and to avoid uploading content that is already in their cloud (another customer has the same file).
