How to Backup Your SHSH Blobs Using Firmware Umbrella [Mac]

Source : Internet
These are instructions on how to backup your SHSH blobs using Firmware Umbrella. You can find the Windows version of this tutorial 
here

Step One
Download the latest version of Firmware Umbrella from here to your Desktop.

Step Two
Double click the downloaded TinyUmbrella.pkg file then follow the prompts to install the application.






Step Three
Connect your iPhone to the computer and double click the TinyUmbrella icon in your Applications folder to launch the program.


If asked, enter your administrative username and password.


Step Five
Make sure your iPhone is selected from the list on the left, then click the Save SHSH button.




Step Six
Once completed you will notice a new entry in the Saved SHSHs for iPhone list confirming the successful save of your SHSH blobs.


NOTES:
If Umbrella is not able to detect your ECID then you can find it and enter it manually. Use these tutorials to help you determine your ECID.
- iPhone: Mac, Windows
- iPad: Mac, Windows

**Thanks to semaphore for his work on this tool!