How can I get a trial version of Toad for Oracle on Mac to test its working on macbook?
Visit the following page... once you furnish your e-mail, etc. you'll be given the choice to select either Windows or Mac flavor of Toad for Oracle...
Looks like you're hitting the link to Buy Online, although that should work too (just tested all links again... works on FireFox and Chrome browsers)
Are you clicking on the download links, as per snap below?
Can you share the link or url?
It's the link I shared in my original reply. If you still get the same message, some countries might be blocking the link for some reason.