The HomeBrew formulaes for install QtVirtManager on OS X
brew tap F1ash/homebrew-qt-virt-manager
brew install qt-virt-manager
If you have installed virt-manager, then for build and install
qt-virt-manager try to do:
brew tap F1ash/homebrew-qt-virt-manager
brew install f1ash/qt-virt-manager/spice-protocol
* Note: it is correct for OS_X newest than Maverick.