What Ann said.
You missed this cautionary warning on the same page where you added this topic;
Note: please do not post Photoshop Elements questions here. Thanks!
do they even support it any more?
do people really still use it?
B)
Isn't Elements 4 from the dark ages?
Well, there was never an Elements 5 for Mac, just as there is no elements 7 for Mac. This means that Elements 6 is the current version for Mac, and Elements 4 is only one version behind.
I have an abysmally low opinion of Elements, any version.