I recently purchased a new iMac 27" with Yosemite. I encounter a problem when I import a jpeg from a Dropbox folder into Word for Mac 2011. Word freezes or becomes very slow to respond, the activity monitor shows Word at greater that 100% CPU time. I've deleted and reloaded Word, verified I have all the latest versions of Word and Yosemite and tested all the memories. If I put the same jpeg file on the desktop and import to Word there is no problem. I've had 2 calls with Apple and one visit to a Genius Bar with no solution. The Genius Bar guy suggested there is a problem that seems to be Yosemite running Word for Mac 2011 accessing Dropbox. Sorry if this is already reported but I'm at a loss for a solution.