That's basically my question. I have a Mac that I keep parked on Mojave, and I'd like to put Kontakt on it if possible. Is this a thing? Or am I out of luck?
You don't get licences for older software unfortunately, so you can only use Kontakt 7 if you bought it outright. If you upgraded from a previous version you can still use that older version.
Or you may buy secondhand an older version....
Do you have a license for said older version ? If so then you can download legacy installers for Mac OS , or else download the Player version for free !
Else you could maybe acquire a license over at the buy and sell part of the forum !
Here is a good nice serving of links for you ! :
Legacy Installers for Native Instruments Software Products : https://support.native-instruments.com/hc/en-us/articles/360000306817-Legacy-Installers-for-Native-Instruments-Software-Products
Native Access Legacy Installers for Older Operating Systems : https://support.native-instruments.com/hc/en-us/articles/360000407909-Native-Access-Legacy-Installers-for-Older-Operating-Systems
Kontakt (Player) Legacy Installers for Older Operating Systems : https://support.native-instruments.com/hc/en-us/articles/360000568949-Kontakt-Player-Legacy-Installers-for-Older-Operating-Systems
How to Downgrade Native Access 2 to Native Access 1 : https://support.native-instruments.com/hc/en-us/articles/4748946468497-How-to-Downgrade-Native-Access-2-to-Native-Access-1
Compatibility of Native Instruments Products on macOS : https://support.native-instruments.com/hc/en-us/articles/360014900358-Compatibility-of-Native-Instruments-Products-on-macOS
N.I. Forum Buy / Sell / Trade
https://community.native-instruments.com/discussion/62/buy-sell-trade#latest
Buying or Selling a Native Instruments Product Second-Hand :
https://support.native-instruments.com/hc/en-us/articles/210288845-Buying-or-Selling-a-Native-Instruments-Product-Second-Hand
How to Enable Full Disk Access on macOS : https://support.native-instruments.com/hc/en-us/articles/4415601248657-How-to-Enable-Full-Disk-Access-on-macOS
Notes on Hard Drive Formats on Mac Computers
https://support.native-instruments.com/hc/en-us/articles/214134545-Notes-on-Hard-Drive-Formats-on-Mac-Computers
Thanks for the info and suggestions, everyone!