'No Valid Kits Found' in Qt Creator

Question

I am installing Qt 5.5 on a new machine, and I ran into this exact same issue last time I set up my environment, but I completely forgot how I fixed it and have been working on it for hours. I've looked at questions on SO here, and a few other places, but none of them solve the issue for me.

I am running on OS X, and the fact that I ran into this problem the last time I installed it makes me think this is a surprisingly common issue for just trying to start a new project.

Anyone solved this problem on Mac before?

Solution 1

This happend for me because during the install on the versions page there is a tickbox stating (Use latest releases). As this seemed like a reasonable default I proceeded. This actually installed no Qt versions. So there were no kits installed. Hence this error during first use.

The problem is due to not making a selection in the list on the right, and can be remediend by running (Mac OS) ~/Qt/MaintenanceTool.app which will run through windows similar to the installation process. Select a Qt version on the page shown here.

Solution 2

Qt Creator is only the IDE. You need the actual Qt libraries to build an application.

I suggest you uninstall your standalone Qt Creator, and install a Qt 5 package from http://www.qt.io/download-open-source/. This package includes both the Qt libraries as well as the Qt Creator IDE.

Solution 3

Alternately you may use C:\Qt\MaintenanceTool.exe to install missing components of your Qt Installation.