Final Cut has not been working since I upgraded my OS

Click on your account at the bottom left of the App Store window.

Final Cut Pro should be there, on your list of purchases.

If it is, you'll be fine.

If it says "Update", then click the Update button.

If it only says "Open": quit the App Store, go to your Applications folder, and drag Final Cut Pro to the trash - don't empty it. Then go back to your account in the App Store and click the download button.

You will be warned that the current version (which is now FCP 11) does not work on your OS, and asked if you want the most recent compatible version. Confirm.

Now if you don't see Final Cut Pro amongst your purchases, it is trickier. Maybe you used a different Apple id? Maybe you bought it bundled with your mac and never "accepted" the purchase into your id?

Let us know.

AidaMillian wrote:

Any other free Apple App to edit?

There is iMovie which should already be on your Mac or if you want something more advanced (even than FCP) download the free version of DaVinci Resolve, it's not as fussy about operating systems.

The free version of Resolve is more capable than FCP.

Resolve

The only things lacking are Voice Isolation and the Magnetic Mask.

Because it is a true professional app it has considerably more adjustable parameters and as such the interface looks more formidable and may require a steeper learning curve.

FCP like iMovie, is designed for ease of use and beginners can achieve results with a minimum of fuss.

I suppose a good analogy would be to think of them as an automatic car versus one with a manual gearbox.

"Accepting" would only need to occur when purchasing FCP bundled with a new mac.

In either of the two other alternatives (buying FCP alone, or the ProApps Bundle), it would already be tied to your id.

Did you purchased FCP directly at the App Store? Or perhaps the bundle (including Logic, Motion, Compressor and MainStage, I believe)?

If it is not appearing, then either it was bought with a different Apple id, or maybe it is hidden.

In the account page, click "Account Settings".

There is a section about hidden purchases. See if it is there.