Q: final cut pro won't update says unavailable with this apple ID

IS the application on your purchases page in the App Store? Are you logged in with the Apple ID used to purchase it?

Do you see the application in the Purchases page? If you do, move the application from the Applications folder to the trash and redownload it.

TThen you're logged in to the App Store with the wrong Apple ID that was used to purchase the software from the store.

Hi there! I've got a similar problem. In El Capitan FCPX does not want to start and it tells me that I do need an update. It shows me a window in which I can go to the App-Store. It then points me straight to the FCPX and wants 299€. I have bought it a long time ago, and it is still working on my other Mac. But here it does not even shop up under my purchases. And yes, I am sure I am using the right account.

Has anyone found an answer to this problem yet?

Thank you

If you are certain you are using the Apple ID that was used to purchase it, and are connected to the correct App Store, and it still doesn't work, you will have to contact App Store support.