So I just installed qt around 5 minutes ago, and when I wanted to code a simple line of text in the Push Button and try to run it, I got this error:
:-1: error: Coul
The problem is that the online installer for Qt currently supports OSX 10.8 (Mountain Lion) by default, and I'm guessing you are on 10.9 (Mavericks) or greater.
There is a workaround:
!host_build:QMAKE_MAC_SDK = macosx10.8
to:
!host_build:QMAKE_MAC_SDK = macosx10.9 if you are on OS X 10.9 (Mavericks), or!host_build:QMAKE_MAC_SDK = macosx if you are on OS X 10.10 (Yosemite)