In 10.10.3, the command '/usr/sbin/spctl --disable' no longer sets Gatekeeper to Mac App Store Only, as used in the JAMF script 'Gatekeeper - Mac Store Only' (https://jamfnation.jamfsoftware.com/viewProductFile.html?fid=587).
In this new release of OS X, you must use '/usr/sbin/spctl --master-enable' to achieve the same result.
