Thank you for posting your query here.
In order to download and install Creative Cloud App on your Mac OSX10.11 or earlier , please Go to the direct download link : https://helpx.adobe.com/in/download-install/kb/creative-cloud-desktop-app-download.html
And Scroll down to the Section "Problems installing? Try alternative download links".
Under the Heading " macOS | Alternative downloads ", you will find the "macOS v10.11 or earlier" Download link.
Please let us know if that ...