If you've updated Dropbox for Yosemite, you've probably noticed the giant green checkmarks all over all your folders. It's great to know that my files are being synced, but frankly I don't care when it works. The only thing I care about is when it doesn't work (or when when it's actively working, that's nice too). The rest of the time, it's just a folder on my machine, and the Dropbox fairies fly my data around invisibly.
So! To reclaim that invisibility, I've disabled the checkmarks on my machine. And you can too!
tl;dr - Change the filename of the checkmark image.
First, find your Dropbox app. Mine is in
/Applications/, as yours most likely is. Right click it in Finder, and select Show Package Contents. All you'll see is a single folder,
Contents. Open that, then open
PlugIns. There will be just one file here,
So right click on
garcon.appex and select Show Package Contents again. Same as before, open
Contents, but this time open the
Resources folder. Inside, among other files and folders, are four
.icns files. All you have to do is change the file name of
overlay-uptodate.icns to anything else. You can do this by single clicking the file and pushing the Enter key on your keyboard, or by right-clicking it and selecting Get Info.
Personally, I like to rename things like this to
.old, that way I can just take off the
.old if I ever want to undo the change.
The last step is to restart Finder. Just hold down the Option key on your keyboard (also known as the Alt key) and right-click on the Finder icon in the Dock, then select Relaunch.
There you go! No more crazy checkmarks, but the other icons will show up to let you know when sync is occurring or fails.
If you ever want to undo this and get the checkmarks back, you can just rename that file to its original name (
overlay-uptodate.icns) and restart Finder as above.
Updating Dropbox will also (probably?) undo this, so you may need to do this again one day.