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The right way to do this is install from the Mac App Store. If I'm not mistaken, the developer has to actively disapprove it, otherwise you can install and run it. Well perhaps more correctly, to see if the developer DISAPPROVED use in such a way. I'm guessing that on first run, a check is now done to verify that the developer approved use of the app on macOS. So Apple enabled an option to block that from being possible. "sideloading", which I first overlooked you mentioned). What happened was some people were pulling the IPA files for unapproved apps using iMazing or similar and running them that way (i.e. The process for not allowing apps to run if developers objected was always in place. It doesn't respond for keyboard navigation (probably never implemented even for iPad if a kb is paired) and even clicking on screen is clunky and uneven in response. Chunky, a comics reader for iPad that is absolutely fantastic, doesn't work well. The Eufy app for viewing footage from my doorbell cams flat out crashes when trying to stream. Not everything I've tried has worked well. ths iOS version WORKS! It works perfectly as far as I can tell, and I can even associate PDF files to it by default. works GREAT! Another long-time wish list item of mine and many people was to see Good Reader, an outstanding PDF viewer for iOS, be ported to OS X. Earlier this week, I started to reach for my iPhone to remotely adjust the thermostat when it suddenly occurred to me that I should be able to load and use the app on my MBA that was already sitting in my lap. Early on I gave a couple games like Galcon a whirl and they worked fantastic. I've been slowly trying out a handful of apps I have for my iOS devices on the M1 MacBook Air as it occurs to me to try them.
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