连接第二部iPhone时出错，错误的详细信息如下。
我还试图通过另一个讨论中的答案来修复错误：https://apple.stackexchange.com/questions/242678/xcode-error-the-maximum-number-of-apps-for-free-development-profiles-has-been-re
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Details
Unable to install "App"
Domain: com.apple.dt.MobileDeviceErrorDomain
Code: -402620383
--
The maximum number of apps for free development profiles has been reached.
Domain: com.apple.dt.MobileDeviceErrorDomain
Code: -402620383
User Info: {
DVTRadarComponentKey = 487925;
MobileDeviceErrorCode = "(0xE8008021)";
"com.apple.dtdevicekit.stacktrace" = (
0 DTDeviceKitBase 0x00000001276e481a DTDKCreateNSErrorFromAMDErrorCode + 233
1 DTDeviceKitBase 0x0000000127725f70 __90-[DTDKMobileDeviceToken installApplicationBundleAtPath:withOptions:andError:withCallback:]_block_invoke + 155
2 DVTFoundation 0x000000010e3faf25 DVTInvokeWithStrongOwnership + 73
3 DTDeviceKitBase 0x0000000127725ca8 -[DTDKMobileDeviceToken installApplicationBundleAtPath:withOptions:andError:withCallback:] + 1654
4 IDEiOSSupportCore 0x000000012759ce91 __118-[DVTiOSDevice(DVTiPhoneApplicationInstallation) processAppInstallSet:appUninstallSet:installOptions:completionBlock:]_block_invoke.352 + 4165
5 DVTFoundation 0x000000010e52e5c4 __DVT_CALLING_CLIENT_BLOCK__ + 7
6 DVTFoundation 0x000000010e530206 __DVTDispatchAsync_block_invoke + 1194
7 libdispatch.dylib 0x00007fff6db806c4 _dispatch_call_block_and_release + 12
8 libdispatch.dylib 0x00007fff6db81658 _dispatch_client_callout + 8
9 libdispatch.dylib 0x00007fff6db86c44 _dispatch_lane_serial_drain + 597
10 libdispatch.dylib 0x00007fff6db875d6 _dispatch_lane_invoke + 363
11 libdispatch.dylib 0x00007fff6db90c09 _dispatch_workloop_worker_thread + 596
12 libsystem_pthread.dylib 0x00007fff6dddba3d _pthread_wqthread + 290
13 libsystem_pthread.dylib 0x00007fff6dddab77 start_wqthread + 15
);
}
--
我遇到错误 1 次，重新启动我的 Mac，然后在 XCode 中再次输入我的 Apple 帐户，错误消失了。
或者，也许您可以创建另一个帐户并使用它，有时xcode会发疯，关闭它并重新启动它对我有用，希望对您有所帮助。