Information about the newly added Peak Limiter Notice to users of Mac OS X 10.8 or later Apple has tightened its security in OS X 10.8 (Mountain Lion) and later.
If it is out of date and an update is not available in the Mac App Store Updates section, you can downloaded and install the current version manually.
See About firmware updates for Intel-based Macs for the specific update steps on older Macs: All about the Mac Pro,1.1.
Firmware provides the instructions for the hardware on your Mac to run correctly.
Is there some specific behaviour you are concerned about?
When the Rebanding takes place, your scanner will usually stop working on Motorola trunking systems.
Download Mac Linux USB Loader allows you to put a Linux distro on a USB drive and make it bootable on Intel Macs using EFI.
Alternatively, you can find firmware updates on the Apple Support site.
Note: Some USB and Fire Wire devices may prevent firmware updates from installing correctly; disconnect non-essential devices and use only an Apple keyboard and mouse to apply the update.
Notice to users of Mac OS X 10.8 or later Apple has tightened its security in OS X 10.8 (Mountain Lion) and later.
The alert dialogue says "[File name] can't be opened because the identity of the developer cannot be confirmed”.
To eliminate the interference, all public safety systems operating between 865-869MHz will "reband" to 851-854MHz and join with other public safety frequencies operating from 851-861 MHz.