I just downloaded Open Office to my Mac Book Air and installed it. When I tried to open it a message came up saying it's developed by an unidentified source and my computer settings only allow installation of programs from Mac App Store or identified developers. I don't know anything about code. What can I do?
You have just seen GateKeeper in action.
If you are confident you downloaded a safe copy of the program, you can tell your Mac to "trust" that program and let it past the gate.
- Right click on the icon
- Select Open
- Read the dialog and agree or disagree to let that program run
The linked article above goes into much detail on GateKeeper and I would scan it and review the steps above. If you find a lot of software you need triggers the warning, you could relax the settings, but I prefer to keep them at the defaults as I like to know when new code runs on my Mac.