Photoshop, Illustrator and Acrobat Installer for Mac High Sierra 10.13.6

as mentioned by @John T Smith, adobe download links prior to cc 2020 are available from prodesigntools.com. https://prodesigntools.com/adobe-direct-download-links.html

follow the directions (esp, step 1)

save the install file.  it may not remain online.

thank jim @ prodesigntools.com

if you want cc 2020 or cc 2021, you must contact adobe support.

use a browser that allows popups and cookies and contact adobe support by clicking here, https://helpx.adobe.com/contact.html?rghtup=autoOpen
in the chat field (lower right), type AGENT
be patient, it can take quite a while to reach a human

p.s you can also use phone (but chat is usually quicker), https://helpx.adobe.com/contact/phone.html

p.p.s. you can also use twitter to tweet @AdobeCare

p.p.p.s. if you're contacted by anyone (via email or private message), it's much more likely to be a scammer than an adobe representative. ie, double check for an employee badge if contacted in the forums and look for an adobe.com domain in the email address if you click reply to an email. then check again and be very suspicious. any other method of contacting (or offering to contact you) is almost certainly a scam, https://community.adobe.com/t5/using-the-community-discussions/staying-safe-in-the-adobe-support-community/td-p/12919684/redirect_from_archived_page/true

Adobe now offers the current and ONE older version via the online program manager
Go here for all older links https://prodesigntools.com/adobe-direct-download-links.html
-Prodesigntools is an official Adobe partner, and the links go to Adobe, not a 3rd party site

IF/When you do have a download, be sure to copy it to AT LEAST one external device
-you should ALWAYS keep a copy (or two!) on an external device
-since Adobe DOES SOMETIMES REMOVE OLD VERSIONS FROM THE SERVER
-a usb flash drive or external hard drive, or write to a CD or DVD