I need to ensure my code runs on OSX 10.9, 10.10 & 10.11. Travis has a flag for building in the OS X environment (default being 10.9) - in .travis.yml:
os: - osx
and flags for individual OSX/Xcode combinations, but it seems only one of these at a time can be specified -e.g:
osx_image: xcode7
Is it possible to specify in .travis.yml combinations of OS X (& Xcode) & if so how?