Yes. I have had almost the same problem. I upgraded(?) from QS 10.4.11 to OS 10.6.4 a couple of days ago. When I try to download ADE to my Mac intel Core Duo I get an error message 2/3 of the way through the download that states "There is an error opening this document. There was a Macintosh system error (-1409)" I have no idea what system error -1409 is, but I did get the exact same message when I attempted to download ADE while using
Since I received the same error messaage using either ) OS, I suspect that there is an incompatibility between ADE and the basic Mac system.
I hope someone that has some knowledge of this stuff reads and advises us if and what we should do.
I'm on an iMAC using 10.6.4 as well but I think ADE works like it should.
When I purchased a .pdf version of a book I downloaded a .acsm file instead of a .pdf file on my winXP puter. At first I was confused as to what this file was. I executed the .acsm file a couple of times (I read that Internet Explorer has issues with .acsm files) before it downloaded the .pdf version. I copied the .pdf file over to my mac. I did not want to use it on my WinXP puter. When I executed the .pdf file on my mac a message came saying something about Digital Rights Manager and do I want to install it. Safari opened and took me to the ADE site to download it. I did and it installed and opened the .pdf file. I'm sure I've registered at one point but do not remember where in the install process. Below is a site that has some good info. to help you troubleshoot issues with .acsm. I cannot say it is a mac issue cause it works on mine. Something has to be wrong with either the Install or the Registration of ADE.