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FreeFileSync - an open-source file and folder comparison and synchronization tool

We often try to keep a backup of all our data in our computer to a external storage such as HDD, network storage etc.  Over a period of time maintaining a synchronization between data on the computer and external storage becomes if you don not have good backup tool. FreeFileSync  helps us in resolving this poblem.  FreeFileSync is very easy to use and syncs the data in quick time. This tool can be downloaded here.


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How to find firmware or boot ROM version in Mac OS X

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}'

How to boot into recovery mode on mac without holding Command + R Key on keyboard ?

Generally well known method to boot the mac into recovery mode is by holding the Command + R on keyboard while mac is turned on. However you can force the mac to boot into recovery mode upon next reboot by changing the nvram setting. To do that, Run below command.  

sudo nvram "recovery-boot-mode=unused" sudo reboot