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Command Line Music player in mac os x

The Mac OS X provides a command line music player if you do not want to use iTunes or any other music player, which is very easy to use. Just supply the music file (such as mp3,wma , etc) located in a directory "afplay" command as below.

afplay  /Users/user/Music/yourmusic.mp3


afplay -h    will give you all the other options available with the command.

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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 decrypt the Filevault encrypted volume using Recovery HD ?

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