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I have a MacBook Pro (2015), and an iPhone 7 Plus.

The problem is the following: If the iPhone is connected to my Mac, then whenever I run an app via XCode, or the Mac is just transferring data, the iPhone starts disconnecting and connecting (the battery icon indicates it), and the data transfer fails.


First I thought that this was a cable issue, because If I adjust the cable in a certain position then it works, but I realized that it is not:

because

  • I bought brand new cables

  • I cleaned the USB port of the Mac

But still nothing

It is really annoying.


Sometimes it gets fixed if I unplug & reinsert the USB like 5-7 times.

  • I have a feeling that your USB port has a physical problem. This post has more details on this. You can test this by connecting a USB drive and attempting to transfer large amounts of data to/from the drive. If it fails, it's the port. – Allan Dec 13 '18 at 21:27
  • I ALWAYS experience this, and I know many fellow people who experience this. You are not alone in this issue. I may think it is a problem with either the the cords as a whole or hardware. I would love to hear from someone who was had this problem and solved it. Also, I have an iPhone 6s and a MacBook Air. – Randall Hall Dec 13 '18 at 21:39
  • This question had some helpful answers: apple.stackexchange.com/q/298573/45492 – n1000 Dec 21 '18 at 8:12

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