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Hardware: Any 64-bit capable Intel Mac

RAM: 4GB, 2GB min
HD: 3GB free space
How to tell if your Mac is 64-bit capable
- http://support.apple.com/kb/ht3696
- sysctl hw | grep 64bit

OS: Mac OS X 10.7.3

How to tell what version of Mac OS X you are running
- Apple Menu () -> "About this Mac..."
- sw_vers
Where to get it
- Apple Menu () -> "App Store..."

Note: Mac OS X 10.7 will be the only version of Mac OS X supported by Oracle. 10.6.8 + Java for Mac OS X 10.6 Update 6 should continue to work for the foreseeable future. We do not expect to use 10.7-only API in the codebase.

Xcode

4.1 required for Mac OS X 10.7.3
- Where to get it
  - Apple Menu () -> "App Store...", free download
- Run Xcode, choose Preferences -> Downloads -> Components, then select and install Command Line Tools
- In a shell, run the following command:
  - sudo xcode-select -switch /Applications/Xcode.app
3.2.6 required for Mac OS X 10.6.8
- Compiler flag fixes which correctly aligns the stack between function calls in 32-bit processes (3.2.6)
- Where to get it
- http://developer.apple.com (Mac Dev Center section)

After you install Xcode, you will have to install Java for Mac OS X 10.7 Update 1, Java for Mac OS X 10.6 Update 6, or a later developer preview to correct headers in the JavaRuntimeSupport framework.

Java: "Java for Mac OS X 10.6 Update 6"

Required for new API added for OpenJDK on Mac OS X 10.6
Where to get it
- http://support.apple.com/kb/DL1360

Mercurial

Required to get source
Where to get it
- http://mercurial.berkwood.com/

Jtreg

Required only to run regression tests
Where to get it
- http://openjdk.java.net/jtreg/