After downloading and installing ADE for Mac on my MacBook Pro (version 10.7.5) I tried to download a DRM-protected eBook only to get the message "E_ACT_NOT_READY".
After some research on the Internet I tried to deauthorize my computer as follows:
The authorization information in device is damaged. The best solution is to delete the device authorization and reauthorize the device again.
Follow the steps on the following link to fix this issue:
Can anyone tell me what I can do to enable the authorization of my computer fulfill the eBook download ?