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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}'
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How to disable USB ports on Mac OS X Mavericks, Yosemite or El Capitan ?

We might wonder how to disable the USB ports on Mac to prevent data copy to external USB mass storage devices. The USB kext on os x is loaded at the time of start of the system, this can be loaded / unloaded using kextload or kextunload command. To disable USB port on Mac , follow below steps: On Macs running  Mountain Lion, Mavericks  and Yosemite : Unmount any connected USB devices to the system by running below command                  $ diskutil unmount /Volumes/USBDISK. Now unload the USB related kernel extensions in the following order using kextunload command.             sudo kextunload -b com.apple.driver.AppleUSBCardReader             sudo kextunload -b com.apple.driver.AppleUSBODD             sudo kextunload -b com.apple.iokit.IOUSBMassStorageClass        This wil...
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How to setup Redhat cluster and GFS2 on RedHat Enterprise Linux 6 on Vmware ESXi

1)     Installing RHEL6 on Vmware esxi  with clustering packages . a)     Creating a RedHat Enterprise Linux 6.0 Virtual image. i)       Open vSphere Client by connecting to a Vmware ESXi Server. ii)     Login into your vSphere Client iii)    Goto File -> New -> Virtual Machine (VM). iv)    Select Custom option in Create New Virtual Machine Window and click Next v)   Give a name to the virtual machine(VM) ( In my case name of my virtual machine is – RHEL6-ClusterNode1) and click next. vi)    Select a resource pool where you want your VM to  reside ( In my case , I have created a      resource pool named RHEL6-Cluster.) and click Next. vii)  Select a datastore  to store your VM files  and Click Next. viii) Select VM version which is suitable for your environment.( In my case VM version is 7) and click Next. ix)   Specify ...
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