Due to an old High Sierra Mac OS, performance suffers in the newer Photoshop 2020 versions. I got a temporary download link through support. But the Adobe installer is not working properly (broken) and reports error 41 that I do not have access permission. Which is not true. Coincidentally, I had a different Adobe Installer of Lightroom. So I created a new folder. Copied the Lightroom installer into it and also the folders from the Photoshop install. Then it works and my old High Sierra got a solid Photoshop 2019 alongside the already existing Photoshop 2020.
Direct Download Links https://prodesigntools.com/tag/ddl MAY help -you MUST do what it says in Note: Very Important Instructions -https://prodesigntools.com/adobe-cc-2015-direct-download-links.html#download-instructions -the prodesign links go directly to Adobe's file server, so this process --will only work until Adobe completely removes the old version(s) from the server . IF/When you do have a download, be sure to copy it to AT LEAST one external device -since Adobe does sometimes remove old versions from the server -a usb flash drive or hard drive, or write to a DVD -plus a text file containing your serial number if you have CS6