Create a USB Bootable Disk on OS X

To create a bootable USB Disk in Mac OS X, You must have the Application of the version of Mac OS X that you want to install downloaded and extracted.  Please make sure you have a mac and root access before proceeding.

So for this example we are going to use macOS Sierra.  You must have the "Install macOS Sierra.app" and if your looking for step by step instructions it must be downloaded into your Applications Folder.

To download an older version of MacOS from Yosemite to Catalina, you can download the MacOS App using this url https://support.apple.com/en-us/HT211683

Plugin a Flash Drive; I'm going to use a Verbatim 16GB USB Flash Drive. Open /Applications/Utilities/Terminal.app

sudo /Applications/Install\ macOS\ Seirra.app/Contents/Resources/createinstallmedia --volume /Volumes/STORE \N \GO --applicationpath /Applications/Install\ macOS\ Seirra.app --nointeraction

You can modify this command line to use with any previous version of OS X if you can get a copy of the Install.app and replace the bolded text with the previous version of the OS X install.app  for example "Install\ OS\ X\ El\ Capitan" and you must put \ $text so the mac can recognize spaces in the name.  The \ is an "escape" and tells the OS that there is a "space" character.

***UPDATE***

You can find this on apple's knowledge base for the issue but they removed the application path for the USB installer.

sudo /Applications/Install\ macOS\ High\ Seirra.app/Contents/Resources/createinstallmedia --volume /Volumes/STORE \N \GO

https://support.apple.com/en-us/HT201372

***Pre High Seirra***

sudo /Applications/Install\ macOS\ Seirra.app/Contents/Resources/createinstallmedia --volume /Volumes/STORE \N \GO --applicationpath /Applications/Install\ macOS\ Seirra.app --nointeraction

Below is the log from my terminal screen.  This could take up to 10 - 30 minutes depending on your system, and if may have to make adjustments if your file system is case sensitive or not.

sudo /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/STORE\ N\ GO --applicationpath /Applications/Install\ macOS\ Sierra.app --no interaction

Erasing Disk: 0%... 10%... 20%... 30%...100%...

Copying installer files to disk...

Copy complete.

Making disk bootable...

Copying boot files...

Copy complete.

Done.

At the end of this you will have a bootable USB device that you can do a system recovery, disk image, or a fresh install of your mac with.

Backing up your Android Phone's Stock Rom and Recovery

Backing up your Android Phone's Stock Rom and Recovery

Have you ever wanted to mod your new android phone but wanted a way to get back to the factory settings without having to mod the phone first?  It is possible to do but you need a few things, the Android Dev tools, fast boot, and some command line know how.  For this example I will be using a HTC One X on the Telus Network.

With HTC you have to get a developer token which can be obtained from http://www.htcdev.com.  You will have to sign up as a dev to get your developer token.  HTC has a great tutorial on how to unlock your bootloader on the htcdev site.

Once your bootloader is unlocked you can now download a 3rd party rom manager (don't worry we are just going to boot off it; were not installing it yet - also make sure you have enabled USB Debugging in the developer tools).  I used TWRP, it is more compatible with my device then clockworkmod is.  Once downloaded (I renamed the downloaded rom manager to recovery.img) and moved it into my fastboot directory on my computer.

Here is a look at the fastboot directory on my computer

Now the fun can begin; make sure you have all the files you need in the directory your working out of, in my case the fastboot directory.  Your phone should be plugged in via usb to your computer then I used adb to reboot my phone into the bootloader

C:\fastboot>adb reboot bootloader

Then I booted off the recovery.img file in my fastboot directory.

C:\fastboot>fastboot boot recovery.img

Then your phone should boot off the custom recovery rom without installing it.  Then you can make a backup using the recovery rom.  Once done reboot into the phone's system and load a file manager like ES File Explorer to get the files off using dropbox or some other means.

Now you have a backup of your stock phone and you can now mod your phone to your heart's content.

Update:  I forgot to mention that with HTC you also have to update your boot.img file using the commandline interface.  To get the boot.img file you can get it by extracting it from your backup or the zip file from your thrid party rom like cyanogenmod.

C:\fastboot>fastboot flash boot boot.img