We've released a handful of apps on iOS with AIR 15, which supported devices as far back as the iPod Touch 3rd Generation. Unfortunately AIR 18 doesn't support this old device anymore, and as we're preparing updates for these older apps we're wondering if others have experience with releasing app updates that dropped support like this.
We're planning to change the MinimumOSVersion to 6.0 in the update -- which should in theory prevent that unsupported 3rd gen iPod from downloading the app. I haven't found any clear information though on what happens if someone had previously purchased the AIR 15 version of the app on that older device. Will this new update just not show up for those users? Or will it let them install it (and be broken since it doesn't support that device)?