Making Minecraft use 64-bit Java on the Mac

64bitminecraft.sh

#!/bin/bash

# Perform Backup of all the files

if [[ ! -d ~/Minecraft_Backups/ ]];then
echo "Creating backup directory ~/Minecraft_Backups/"
mkdir -p ~/Minecraft_Backups/
fi
tar -czf ~/Minecraft_Backups/`date +%Y%m%d`-backup.tgz /Applications/MinecraftSP.app

#Modify the Info.plist file for the new version of Java
if [[ -a /Applications/MinecraftSP.app/Contents/Info.plist ]];then
sed -i -e 's/1\.5\+/1.6+/' /Applications/MinecraftSP.app/Contents/Info.plist
sed -i -e '/I386/ c\
X86_64<\/string>\
I386<\/string>\
' /Applications/MinecraftSP.app/Contents/Info.plist
else
echo "Info.plist not found in /Applications/MinecraftSP.app/Contents/"
fi

cp /System/Library/Frameworks/JavaVM.framework/Resources/MacOS/JavaApplicationStub /Applications/MinecraftSP.app/Contents/MacOS/

On Terminal run:

bash ./64bitminecraft.sh