I purchased a new Macbook Air yesterday (Early 2015) model , and tried to install the workbench software, it came back and said cannot install on my Drive since I do not have 10.5. and above installed, which I do as I updated the operating system,it reads 10.10.5 which is Yosimite and is above! it installed since on my old 2009 Macbook Pro no problem..and About my Mac confirms it is installed.
Anyone else have had this problem?, or what do i need to do?