Invalid file format

Greetings jojoeyn,

Thanks for reaching out in Apple Support Communities. To clarify, was the file created in Keynote on your Mac?

Let's see if this helps:

• Open a presentation on your Mac: For a Keynote presentation, double-click the presentation name or thumbnail, or drag it to the Keynote icon in the Dock or the Applications folder. For a PowerPoint presentation, drag it to the Keynote icon (double-clicking the file opens PowerPoint if you have that app).

• Open a presentation you recently worked on: In Keynote, choose File > Open Recent (from the File menu at the top of your screen). Keynote shows up to the last ten presentations you opened.

• Open a presentation stored somewhere other than your Mac (such as iCloud Drive): In Keynote, choose File > Open (from the File menu at the top of your screen). In the dialog, click a location in the sidebar on the left, or click the pop-up menu at the top of the dialog, then choose the location where the presentation is saved. Double-click the presentation to open it.

More details here: Keynote User Guide for Mac

Hope this helps.

Cheers.

Good afternoon jojoeyn,

It might be helpful for you to speak with an AppleCare technical advisor about this issue. Click the link below, choose the phone number for your region from the list, and call when it is convenient.

Contact Apple for support and service - Apple Support

Take care.