Q: Installing an Older Mac OS that has a Newer OS
I am trying to install Lion on a Power Book Pro that already has Yosemite install for a duel boot system. The main Application I am installing wont run on Yosemite. When I try to install Lion I get a circle with a slash though it and it won't install. Please help!
MacBook Pro, OS X Yosemite (10.10)
Posted on Apr 24, 2015 7:40 AM
by Csound1,Solvedanswer
Desktops
You will have to erase your Mac and then install Lion.
You do not have a Powerbook, you have a Macbook or Macbook Pro. Power books can't run Lion, or Yosemite.
Posted on Apr 24, 2015 7:44 AM