Apple regularly releases updates for the EFI and SMC firmware. This generally gets installed onto your mac as part of software update. In case you want get more specific details about all EFI or SMC firmware updates , you can get the information from apple support site here and download the updates from the apple site.
Firmware and boot ROM version of your mac can be found in two ways. Way 1 : 1. From "Apple" menu , choose "About This Mac" menu item. 2. Click " More Info " to open "System Profiler" application. 3. Under Contents -> Select Hardware Tree item. On the right side panel Under hardware overview section, we can see Boot ROM Version and SMC (Firmware) Version. Way 2 : Run the below command in terminal to get boot ROM version and SMC(firmware) version : $ system_profiler SPHardwareDataType | grep -i "Version" | awk -F ':' '{print $1 $2}'
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