Smaller (15M) mac image, and tidied instructions.

git-svn-id: https://ho1.svn.sourceforge.net/svnroot/ho1/trunk@2399 b8de521a-fa13-0410-8113-fc7ffabbd59a
1.433 preparation

git-svn-id: https://ho1.svn.sourceforge.net/svnroot/ho1/trunk@2400 b8de521a-fa13-0410-8113-fc7ffabbd59a