updating background image for the osx installer (cherry picked from commit 681ca52)
updating background image for the osx installer
(cherry picked from commit 681ca52)

tagspaces/tagspaces,cbop-dev/tagspaces,tagspaces/tagspaces,tagspaces/tagspaces,tagspaces/tagspaces,tagspaces/tagspaces,cbop-dev/tagspaces,tagspaces/tagspaces,cbop-dev/tagspaces,tagspaces/tagspaces,tagspaces/tagspaces