Not sure I understood what you were asking me to do. When you go to the
page to buy the product is asks you to install some strange downloader, and
offers only one download choice "win/mac" When you download you get only
the Win version. Conversely I also upgraded LR4 and had the choice of Win
or Mac - so that worked fine
Tel: +44 7787 576906
Twitter - @mikemason_co2
The link provided above will take you to the steps to open your account and access the downloads you have available. This will allow you to verify that you do not have the Mac download available to you within your account already.
Alternately you can contact our support team who can look up your order and verify you purchased the correct version of the software. For the best assistance, I recommend our chat support at http://adobe.ly/yxj0t6. Our chat representatives can provide a personalized experience to resolve the issue you have described.