PC's but not Macs can send my "distributed" pdf with data added back to me

Question

I am using Adobe Acrobat 9 Pro on a iMac with Snow Leopard to create input fields on a pdf document.  I then use FORMS > DISTRIBUTE FORM and e-mail the "...distributed.pdf" document to PC and Mac users.  The PC users can enter data in these form fields and e-mail the updated pdf file back to me.  However, Mac users can enter data, but when they e-mail the updated pdf back to me the data is not on the file that I receive. 
When they have Java turned on, PC users see the following on the distributed pdf file that I e-mail to them: (1) A purple bar at the top of the screen; (2) In that purple bar the following text appears "Please Fill out the following form . . . "; (3) On the right side of the screen (in the purple bar), there are two icons with the following labels: "Highlight Fields" and "Submit Form" and (4) On the right side of the screen (below the purple bar), there are input fields with a blue background.  However, Mac users do not see (1) - (4); however, they can enter data in the form fields and save the pdf file.  But as stated above when they e-mail that file back to me, that data is not on the file that I receive.

Answer 1

I resolved this problem myself with the aid of my local Mac User's Group.
The solution was to change the default pdf reader from "Preview" to "Adobe Reader" on the Mac computers that were receiving my "distributed" pdf files.
Having "Preview" as the default program to open pdf files may not affect other users.   However, all Mac users need to realize that even though they have installed the latest version of Adobe Reader, their Mac is still using "Preview" to view pdf files unless they have changed the default pdf reader from "Preview" to "Adobe Reader".   If you ever need to make that change, follow the simple steps below.
(1) Download the latest version of Adobe Acrobat Reader
(1-A) Go to www.adobe.com website
(1-B) Click on "Get Adobe Reader" icon
(1-C) Select your version of Mac OS version and download Adobe Reader
(1-D) Install Adobe Reader
(2) Make Adobe Reader your default program to open pdf files.
(2-A) Move the Adobe Reader icon in your "Applications" folder to the "Dock"
(2-B) Open a pdf file
(2-C) You should then get the following message: "Adobe Reader is not currently configured to be the default application for pdf files.  Would you like to make pdf files open with Adobe Reader instead of Preview?"
(2-D) Click "Yes"
It is very fundamental that Mac user's realize that "Preview" is the default pdf reader.  This information was not available in "Mac OS X Snow Leopard (the missing manual), "Adobe Acrobat 9 - Classroom in a Book", "Adobe Acrobat 9 (Visual Quickstart Guide" or this forum.