Upgrade works without issue
Docker is saying that I ahve VirtualBox 4.3.26 although I do not (I had it installed when I initially installed the Docker beta but removed it so the install can proceed). I’m not sure what it is finding to indicate that VirtualBox 4.3.26 is installed. No VirtualBox is installed in the Applications folder and I’ve cleaned out the Library folder.
From the com.docker.app.log
2016-04-05T22:17:50.906537-04 Info - Application version: 1.11.0-beta6 (5404)
2016-04-05T22:17:50.928010-04 Info - OSX Version: Version 10.11.4 (Build 15E65)
2016-04-05T22:17:51.185508-04 Critical - Docker does not work properly on systems with VirtualBox versions prior to v.5.x. (VirtualBox 4.3.26 currently installed)
2016-04-05T22:19:23.103462-04 Info - applicationWillTerminate
I tried restarting the machine as well