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Downgrade to 1.1

posted Mar 2, 2012, 7:57 AM by A. Wizard   [ updated May 18, 2012, 11:20 AM by Félix De Portu ]
This is the download link  to downgrade your client back to 1.1.  You may need to rename this file to minecraft.jar if your browser renames the file during the download.

Windows 7 Instructions
1. Navigate to your minecraft/bin folder.
2. Right click minecraft.jar
3. Select "restore previous versions"
4. Choose one that sounds right between about a month and 2 months ago
5. Launch minecraft if asked to update say no and check the version number on the title screen

notes: 
* this only works if you updated from 1.1 to 1.2 not if you just downloaded 1.2

Alternate Windows Instructions:
1. Press the windows key and the 'R' key together to bring up the Run Prompt. (This is also the search bar on the Windows 7 start menu)
2. Type %appdata% into the run prompt and press enter. This will open the Application Data or equivalent folder on your computer.
3. Open the '.minecraft' folder. Then open the 'bin' folder.
4. Find 'minecraft.jar'. It may be labeled as just 'minecraft' , but described as a JAR file.
5. Delete (or backup/rename) 'minecraft.jar'.
6. Place the downloaded file into this folder, replacing the one that was just deleted.

Macintosh Instructions
1. Open Finder.app
2. Click “Go” in menubar
3. Then choose “Go to folder…”
4. Type in “~/Library/Application Support/Minecraft/bin” (without quotes)
5. Replace minecraft.jar with the one provided above.

Notes about switching and upgrading:

  • To update again at a later time, from the Minecraft launcher select Options > Force Update.
  • After doing this if you wish to keep 1.1 and go back and forth between 1.1 and 1.2, create a backup of your minecraft.jar in 1.1 or 1.2 state in a seperate folder or renamed(via copy/paste)
    • how to:
      • Use three different minecraft.jar files: two backups and one to be used.  Name the old version minecraft11.jar, the new new version minecraft12.jar and your active file must be minecraft.jar.  
      • Note: these first two file names could be anything.  You are just changing the name to keep track of which is which.
      • To switch back and forth, just copy the version you want to use over top of your minecraft.jar.  To do this, delete your minecraft.jar and copy the version you wish to use and rename the copy to minecraft.jar
  • If something goes wrong and you hose your installation, just delete the entire bin folder and relaunch minecraft. It will automatically update it to 1.2
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