After Apple's switch from the PowerPC processors to the Intel

After Apple's switch from the PowerPC processors to the Intel
processors for its Macintosh computers in 2006 and the switch to
64-bit Intel processors only with the introduction of the Core 2 Duo
processor in 2007, the runtime environment for the latest version Java
6 was released for the 64-bit Intel platform only, leaving the PowerPC
and 32-bit Intel platform behind, with Java 5.

Despite that fact, there were some Developer Preview releases of Java
6 that run also on the PowerPC and 32-bit Intel platform. The
Developer Review supplies the JIT-compiler (Java HotSpot Core VM) only
for the Intel platform, that means the Java VM runs in interpreter
mode only on the PowerPC platform.

> Java Platform, Standard Edition (Java SE) 6 Release 1 Developer
> Preview adds Java SE 6 support to your Mac.
> This Developer Preview does not replace the existing installation
> of J2SE 5.0.
> This Developer Preview requires Mac OS X v10.4.5 or later.
>
> This build has received only limited testing and should not be
> installed on a system with critical data.
>
> ?from the included Readme doc

The 1st download is Java SE 6 Release 1 Developer Preview 5.
The 2nd download is Java SE 6 Release 1 Developer Preview 5 -
Developer Docs.
The 3rd download is Java SE 6 Release 1 Developer Preview 6.

![Note][1] | This software has every potential to screw up your
existing Java and not work.
Read the Comments section below and do some reading (see links) before
deciding on installing.
---|---

Links for install instructions & more information:

Apple: | ? [Java for Mac OS X 10.5 Update 1][2] (Wayback Machine)
---|---
Minecraft Forum: | ? [Minecraft Working on Mac OS X 10.4.11 Tiger][3] (Wayback Machine)
Kunal Dua blog: | ? [How to force reinstall Java on Mac OS X][4]
Stack Overflow: | ? [Java 6 on Mac PowerPC with Mac OS X 10.4][5]
MacUser Forum: | ? [Java 6 SE under OS X 10.4.11][6] (German)

Compatibility
Architecture: PPC x86 (Intel:Mac)

Mac OS X 10.4.5 and later

Does NOT work on Leopard, Installing on Leopard will damage your Java
installation.
Leopard already includes a version of Java 6, but it only functions on
64-bit intel processors.
If you are running Leopard on a 32-bit intel Mac and would like to run
Java 6 apps, I recommend using [SoyLatte][7].
If you are running Leopard on a PowerPC Mac and would like to run Java
6 (or 7) apps, I recommend using [OpenJDK 7][8].

[1]: http://macintoshgarden.org/sites/macintoshgarden.org/files/screenshots/alert-icon-2.png
[2]: https://web.archive.org/web/20150223123932/http://support.apple.com/en-us/HT1856
[3]: https://web.archive.org/web/20140731124009/http://www.minecraftforum.net/forums/support/modded-client-support/1953953-minecraft-working-on-mac-os-10-4-11-tiger
[4]: http://www.kunaldua.com/blog/2006/06/18/how-to-force-reinstall-java-on-mac-os-x/
[5]: http://stackoverflow.com/questions/613175/java-6-on-mac-powerpc-with-mac-os-x-10-4
[6]: http://www.macuser.de/threads/java-6-se-unter-os-x-10-4-11.436840/
[7]: http://macintoshgarden.org/apps/soylatteopenjdk-intel
[8]: http://macintoshgarden.org/apps/openjdk7-ppc