Update instructions to include dev mode

README.md

@@ -6,18 +6,21 @@ This will make a menu appear in settings that looks like this:
 Installation is quite easy.
 
 ## With Mac (the Apple way)
+- Enable developer mode on your phone
 - Install Xcode
 - Connect your phone and launch Xcode
 - Build/Debug any app using your phone
 - In the rare case that the developer images are missing, drag .dmg and .signature for your iOS version into `/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport/<iOS version>` then repeat the last 2 steps
 
 ## With Mac (the FOSS way)
+- Enable developer mode on your phone
 - Install [libimobiledevice](https://libimobiledevice.org/)
 - Connect your phone, and run `idevicepair pair`
 - `cd` into directory where the .dmg and .signature files are saved
 - Run command `ideviceimagemounter <DevDiskImage> <DevDiskImageSignature>`
 
 ## With Linux
+- Enable developer mode on your phone
 - Install [libimobiledevice](https://libimobiledevice.org/)
 - Connect your phone, and hit trust this computer
 - Verify that phone is paired by running `idevicepair pair`