There are 2 issues going on:
1 is a bug in Dreamweaver 2014.1 that we are working on updates to fix, this is the one you are experiencing.
The other is the Mac OS X Yosemite Beta issue that was reported by Codesnap.
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.