Issue #34: on OSX, cannot count on pharo as an installation sentinel, so updateGsDevKit needs an explicit .gsdevkitSetup test
Issue #34: on OSX, cannot count on pharo as an installation sentinel, so updateGsDevKit needs an explicit .gsdevkitSetup test

LisaAlmarode/GsDevKit_home,GsDevKit/GsDevKit_home,LisaAlmarode/GsDevKit_home,grype/GsDevKit_home