This is a summation of Yoav's work as well as mine (some apart, some in parallel, and some together): Verfied: 1063064 - Allow big ranges in MacPoolManager 1063064 - add an explanation tool-tip to the 'Feedback' button 1083065 - EL 7 guest compatibility Work with existing up-to-date engine and vdsm from snapshot repo - Started by installing RHEL7 on an appropriate VM. Had several issues with actual installation, reported on - https://bugzilla.redhat.com/show_bug.cgi?id=1124379 - faulty free-space recognition on disk when installing on virtual machine. https://bugzilla.redhat.com/show_bug.cgi?id=1124688 - installer options are invalid for no reason Finally managed to work-around the issues and installation had started. Was very very slow. Verified there shouldn't be anything interrupting this. At this point tried to work with VMs, but couldn't get the SPICE console to work (BTW, initally SPICE didn't work on the VM in the local environment as well. It then just miraculously started to work). Then tried master again (another environment, let the installation complete on the other VM's installation, but this version of engine did not work). Also opened bz1124143 .