Failure to install on Mac OS X 10.6.8 as documented with 7u4 b11
I filed the following bug, for all others with the same issue:
The core of which is the description:
Attempt to install gives "This Installer is supported only on OS X Lion (10.7.0)." when the pkg file is opened.
Documentation at http://jdk7.java.net/macportpreview/ says:
The Developer Preview should work on any Intel-based Mac, and has been tested on Mac OS X 10.6.8 and 10.7.0.