I have been in contact with both Adobe support twice and Apple App store once on this issue. I had bought a subscription through Apple for the Lightroom CC mobile subscription. However, I wanted to upgrade so I can download Lightroom on my Mac and use it on Mac and iPhone. I tried upgrading through both Adobe and Apple, and since Apple doesn't actually have Lightroom in their App store on Mac I am unable to do it through them. Adobe keeps telling me that my subscription with Apple is still active, however, Apple is saying that my subscription is expired.
I have contacted Adobe support again and they are unable to help and Apple is unable to help. Where do I go from here? As it's getting frustrating and I am at boiling point due to not getting help from anywhere! Chat on Adobe takes forever to reply to me as well (was waiting for about 4 minutes each time before even getting a response!)
The Apple subscription will be only for premium features on mobile devices which is why it has a lower price.
If you are completely happy that Apple have cancelled the subscription for the in-app purchase you could simply install Lightroom Cc directly. You should be able to check your purchase history and status at the app store.
Then download and install Creative Cloud on your Mac from the link below and go to the apps tab to install Lr CC. If preferred you can start as a free trial before commencing the subscription