Original address: https://www.jianshu.com/p/fdbe7ec1ec44

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Before, I met the following prompt when testing the real apple mobile phone

Later, restart the phone, restart Xcode, and even restart the Mac. In a few minutes, you can debug the real machine. At that time, I didn’t think much about it. I thought it was really the CPU of the mobile phone that was busy with other things. Recently, when cleaning up the Mac computer, I found the real reason for this prompt: install something on a mobile phone. For example, the mobile phone system is 10.3.3. If the computer has not run the debugging app on the mobile phone of the 10.3.3 system before, some things in the mobile phone will be copied to the / users / zhangxicheng / library / Developer / Xcode / IOS devicesupport directory of the computer through USB. Basically, a system takes two to three gigabytes. It’s useless for us to do anything while copying files. After copying, you can debug the app. So just wait a few minutes.

In addition: when I cleaned up the Mac, I found that there are many things in the IOS devicesupport directory. I have about a dozen systems, which account for more than 40 gigabytes. I want to delete them, but I feel that I have to copy them next time I connect. It’s rather tangled.

Author: Xiaoxi IOS
link: https://www.jianshu.com/p/fdbe7ec1ec44
Source: Jianshu
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