My Macbook is no longer my primary computer. But, when it was, I found out from painful sensations that it is best to install software from MacPorts, whenever you want, from http://www.macports.org/
More importantly, I also found that when the software was not offered by MacPorts, it was unchanged because that particular software could not be installed without any configuration on the Mac. Therefore, since Macports does not currently offer Qt v5, and I had problems installing the qt -project.com Qt v5.2.1 SDK on my Macbook, I would recommend going with MacPort for Qt v4.8.5 [qt4-mac], which includes qmake. Qt Creator is available as a standalone MacPort [qt4-creator-mac].
Here's how I successfully installed Qt v4.8.5 [with qmake] and Qt Creator on my Macbook:
1) 'sudo port install qt4-mac'
2) 'sudo port install qt4-creator-mac'
3) I used Finder to run Qt Creator, which was in the / Applications / MacPorts / Qt 4 folder.
4) When I first started Qt Creator, an automatically installed desktop set was specified in the Settings dialog box, but this set did not have a Qt version, no qmake and no debugger.
5) Manually added a second set.
6) A configured Qt version kit for / opt / local / bin / qmake, where qt4-mac has qmake installed. This was enough for the kit to now detect Qt v4.8.5, which was installed by qt4-mac.
7) The function of automatic detection of the kit used to detect the debugger.
8) Configure this kit as the default kit.