Question

If Java application requires certain JRE version then how can I check its availability on Mac OS X during installation?

Answer 1

It should be as simple as looking at /System/Library/Frameworks/JavaVM.framework/Versions/

E.g. from my machine:

manoa:~ stu$ ll /System/Library/Frameworks/JavaVM.framework/Versions/ total 56 774077 lrwxr-xr-x  1 root  wheel    5 Jul 23 15:31 1.3 -> 1.3.1 167151 drwxr-xr-x  3 root  wheel  102 Jan 14  2008 1.3.1 167793 lrwxr-xr-x  1 root  wheel    5 Feb 21  2008 1.4 -> 1.4.2 774079 lrwxr-xr-x  1 root  wheel    3 Jul 23 15:31 1.4.1 -> 1.4 166913 drwxr-xr-x  8 root  wheel  272 Feb 21  2008 1.4.2 168494 lrwxr-xr-x  1 root  wheel    5 Feb 21  2008 1.5 -> 1.5.0 166930 drwxr-xr-x  8 root  wheel  272 Feb 21  2008 1.5.0 774585 lrwxr-xr-x  1 root  wheel    5 Jul 23 15:31 1.6 -> 1.6.0 747415 drwxr-xr-x  8 root  wheel  272 Jul 23 10:24 1.6.0 167155 drwxr-xr-x  8 root  wheel  272 Jul 23 15:31 A 776765 lrwxr-xr-x  1 root  wheel    1 Jul 23 15:31 Current -> A 774125 lrwxr-xr-x  1 root  wheel    3 Jul 23 15:31 CurrentJDK -> 1.5 manoa:~ stu$