Not working on Mac... I read other posts but haven't found answer

Local was working great. I was able to develop a few sites and then it just stopped working. when I try to start the program… it just stays on “checking system” and I am not sure what to do.

I saw a few other posts similar… but I didn’t understand what the fix was or it was past my newbie level.

I need to get the sites that are fully developed out of local and deploy on my sites. HELP…