How do I authorize ADE 2.0 on my Mac?

[Henceford]

I have downloaded ADE 2.0 on my Mac and purchased ebooks on line.  I cannot download the books as I cannot authorise ADE 2.0 for my Mac.  The help tells me to click on the info button - I can't see one on the screen the screen just shows a list of products and services when I open it.

[sjpt]

To authorize the Mac, you need cmd-shift-U, or menu/Help/Authorize Computer.

If that goes ok, ignore the rest of this post, but there is a common problem so just in case ...

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Sometimes ADE gets its registration/activation confused and in a semi-authorized state.

Uninstalling and reinstalling does not help, and indeed installation can even trigger this state.

Unfortunately, it often then gives misleading error messages about what is wrong.

A common incorrect message informs you that the ID is already in use on another computer and cannot be reused.

Another is  "E_AUTH_NOT_READY"

This can often be resolved by completely removing any authorization using ctrl-shift-D to the Library screen on ADE (cmd-shift-D if on Mac).

Restart ADE, and then reauthorize with your (old) Adobe ID.

In extreme cases on the mac, the following extra step has helped some people.  Navigate to /Users//Library/Application Support/Adobe/Digital Editions and drag the activation.dat file to the trash. If you are using 10.7, see Access hidden user library files | Mac OS 10.7 Lion. http://forums.adobe.com/thread/1265248?tstart=0