Skip to main content

Enabling debug and hidden checksum formats in Disk Utility.

We sometime expect disk utility to provide more options for debugging on any disk related issues. There is hidden option in mac os x to enable the debug menu item for disk utility with many useful actions associated with it. To enable the debug menu item in disk utility application type and execute following command in terminal.

$ sudo defaults write com.apple.DiskUtility DUDebugMenuEnabled -bool true

This will enable "Debug"  menu bar item in Disk Utility application on your mac os x. You would have quit and re-launch Disk Utility again to show the changes.

To reset back to default settings, run

$ sudo defaults write com.apple.DiskUtility DUDebugMenuEnabled -bool false


Similarly,
We can also enable various hidden image checksum formats in disk utility application with command as below

 $ sudo defaults write com.apple.DiskUtility advanced-image-options -bool true


To reset back to default settings, run


 $ sudo defaults write com.apple.DiskUtility advanced-image-options -bool false





Popular posts from this blog

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 extract signing certificates from macOS binary files

Code signing is a macOS security technology that you use to certify that an app was created by you. Once an app is signed, the system can detect any change to the app—whether the change is introduced accidentally or by malicious code. As Apple Developer site says ( click here for more details  on code signing) : code signing allows the operating system to: Ensure that a piece of code has not been altered since it was signed.  The system can detect even the smallest change, whether it was intentional (by a malicious attacker, for example) or accidental (as when a file gets corrupted). When a code signature is intact, the system can be sure the code is as the signer intended. Identify code as coming from a specific source (a developer or signer).  The code signature includes cryptographic information that unambiguously points to a particular author. Determine whether code is trustworthy for a specific purpose.  Among other things, a developer can use a code signature to s

What are the useful nvram settings in macOS ?

The OS X boot arguments are useful for troubleshooting problems with system startup and how the system behaves when running. sudo nvram boot-args="-v" :  This command will set the system to always boot to verbose mode, so we do not need to hold Command + V at system startup. sudo nvram boot-args="-x" :  This will set the system to always boot into Safe Mode. sudo nvram boot-args="-s" :  This command will boot the system into single user mode without needing to hold Command-S at system startup. sudo nvram boot-args="iog=0x0"  :   when you close the display but connect the system to an external monitor and keyboard the system will stay awake. After running this command, when connecting an external monitor, the internal display will be disabled, which can be beneficial in some situations such as those where you are mirroring your desktop but wish to run the external display at a higher resolution than your laptop can run. sudo nvram b