If you are getting an error message while installing Firebind on a Mac, these steps may help:
(1) The machine may only allow apps from the Apple App Store to be installed. This is a setting in the System Preferences->Security & Privacy. Firebind is an Apple 'identified developer' so be sure that setting will allow installations from 'identified developers'.
(2) Confirm the Mac is 64-bit. The Firebind installer only supports 64-bit operating systems.
(3) Try rebooting the machine and retry the installation.