if we run a device with iOS version (10.3), which may not be supported by the version of Xcode(8.2.1).It shows an alert with warning "Could not find Developer Disk Image".
It clearly indicates that you must have to update your Xcode (8.2.1) to Xcode(8.3).It's really hectic way to download such a heavy file within a short period of time and meet your project deadline.
If you want to save time and run an app on 10.3 devices using Xcode 8.2.1,you just need a new Developer Disk Image for 10.3.
You use the following steps that may work for you.
Download Zip file and extract.(Click here)
Click on "Finder" in MAC OS
Click on "Go to Folder"
You can go to Applications > Right Click on Xcode > Show Package Contents and follow the directories above.
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You'll notice that your versions ends at 10.2. So you need update it to 10.3.
Now,you can paste downloaded folder here.
Finally,you should reboot the device along with Mac OS and Xcode.
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