When trying to launch an app built with Xcode in iOS12, differences occur depending on the macOS version on which Xcode is installed.
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When building with Xcode 26.2 (or Xcode 16.4) installed on macOS Sequoia, installing it on iOS 12 and tapping the app icon launches the app.
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When building with Xcode 26.2 (or Xcode 16.4) installed on macOS Tahoe, installing it on iOS 12 and tapping the app icon does not launch the app. The following log was displayed upon launch:
Dec 15 11:46:35 xxx assertiond[58] <Notice>: Submitting new job for "com.xxx.sample" on behalf of <BKProcess: 0x10151a710; SpringBoard; com.apple.springboard; pid: 48; agency: SystemShell; visibility: foreground; task: running>
Dec 15 11:46:35 xxx assertiond[58] <Notice>: Submitted job with label: UIKitApplication:com.xxx.sample[0x2dfd][58]
Dec 15 11:46:35 xxx assertiond[58] <Notice>: Unable to get pid for 'UIKitApplication:com.xxx.sample[0x2dfd][58]': No such process (3)
The same issue occurs with both .app and .ipa.
I would like to know the technical reason behind this, if anyone knows, please let me know.