Apple hasn't yet added the newest Olympus cameras to their compatibility chart despite being available for at least a year. Here are the workarounds I have found:
On desktop - import your photos using the (free!) Adobe DNG converter - this will convert your ORF files to DNG raw files which can then be imported into Apple Photos.
On ipad/iphone - the only solution I've found to date is to use lightroom to import the photos. This ultimately performs the same function as the converter (above) but requires you to have an Adobe CC subscription - I got the cheapest option I could find (lightroom for mobile only at 5.99/month). once you've converted the pics you can move them into your apple photos library on your phone/ipad.
Hopefully apple will get the compatibility issue sorted at some point!