How to Downgrade Your iPhone 3GS Using a Cydia Saved SHSH [Mac]


To ensure that these directions to work it’s important to have in the past jailbroken on an prior firmware model and opened Cydia permitting it to save lots of your SHSH on file.  Take a look at the home windows model here
Step One
Launch a new Finder window by clicking its icon in the dock.
Downgrade iPhone

Step Two
Click to select Go to Folder… from the Go menu.
Downgrade iPhone

Step Three
Enter /etc into the input field and click the Go button.
Downgrade iPhone

Step Four
Locate the hosts file in the folder that opens then control+control to bring up the contextual menu.

Choose Open With then TextEdit from the menus that appear.
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Step Five
Once TextEdit has opened up the hosts file. Append to end of the document.


Step Six
Select Save As… from the File menu.

Step Seven
Navigate to the Desktop, uncheck the If no extension is provided, use “.txt” box, a
nd make sure the filename is just hosts with no extension. Then click the Save button.

Step Eight
Drag the hosts file from your Desktop to the /etc folder we still have open.
Downgrade iPhone

Click the Authenticate button when prompted.
Downgrade iPhone

Click the Replace button when warned that a file of the same name already exists.
Downgrade iPhone

Enter your administrative username and password when prompted then click the OK button.

Downgrade iPhone

You at the moment are able to downgrade your
tool. Merely put the iPhone into DFU mode and in iTunes Choice+Click on the Repair button to make a choice the firmware you want to downgrade to. In case you get error message 1011 or 1013 simply ignore it. For those who get error 1015 message repeat the complete repair then jailbreak after it fails the 2nd time.

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