Can't deploy to iPhone (not available, please reconnect the device)

Was running into the same issue with XCode 11.7 & iOS 14.0, restarting phone/mac did not help.

I added Device Support files for iOS 14 under XCode.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport

Device support files for different iOS versions are available on github under filsv/iPhoneOSDeviceSupport

Hope this is useful.

I found an easy solution that worked for me - just restart the iPhone device :)

Hope it will do the trick for you as well!

Same issue.
iOs 14.1 iPhone SE 1.gen
Xcode 12.01
macOS 10.15.7

The issue started today after installing iOS 14.1.
Not only this issue is a disaster....

Seem to have found an annoying fix.

With Xcode 12.01 (the latest stable release), I couldn't launch to a 6th gen iPad running iOS 14.1.
Nor could I install a simulator with iOS 14.1.

So.
I downloaded the 12.1 GM seed.
Still couldn't launch run code on the iPad running 14.1.

BUT, from the devices and simulators window I was able to add a simulator with iOS 14.1.

after which: I could launch!

I quit the GM seed, relaunched the stable release of Xcode, and it runs fine.

Annoying. But worky.

Updated Xcode to 12.0 from the App Store and my iPone 8 to IOS 14.1 it resolved the problem

Xcode: 11.5
iPhone7: 14.1

I upgraded Xcode to 12.1 and the issue is still happening - Xcode sees the iPhone 7, tries to deploy to it, but am still getting the error "Can't connect to device"

I then ran the simulator for iPhone 8 Plus (1.41) that came with new Xcode 12.1 - it ran fine. Then deployed to the my real iPhone 7 again and this time it worked. Go figure! Apple Xcode is crap...most of Apple is.

I had the same issues and tried all the options on this thread except one.

Restart your laptop/mac

Xcode 12.1 and iOS 14.1 only worked after I restarted both my device and my laptop.

i tried this Xcode clean build, xcode unpair ,Xcode quit, and restart mac still error appears .... why?

Same here.!
It has happened since xcode 11.1
Is that what we suppose to pay for a developer licence for giving us an issue like this? (No Apple's project manager here to take the responsible to take up the case?)

Apple should really fix this... I think it has to do with the device files in this new version of Xcode... I'm so sick of having to delete the app and re-download all its data manually, and then having to reserve 5 times as much storage on my MacBook Pro as the 15GB size of Xcode.

Look at all these recent comments of people who are just trying to develop something...

PS - I'm developing on an XR right now...

I tried restarting both iphone and mac but it didn't work. It worked fine on simulator just not my phone.

xcode 12.1
ios 14.2

Update: Apparently xcode 12.1 doesn't support 14.2...

Error message from "Devices and Simulators":

The current device configuration is unsupported. This iPhone 11 Pro is running iOS 14.2 (18B92), which is not supported by Xcode 12.1.

Unbelievable!

How is it possible to release a new iOS version without synchronising with the only development framework FOR iOS?
This is outrageous! Half a labour day lost trying to find out, why I can't debug and test on iPhones X and 11 because of this.
Just before updating to iOS 14.2 Xcode 12.1 (12A7403), both smartphones (iOS 14.1) won't connect to Xcode, because the version where outdated. After almost an hour updating the devices, they weren't compatible with the current Xcode version?
It was humiliating to explain it to my superior, why half a day we couldn't work because of error 601...
Now try to research the net for error 601! Lucky we still have an iPhone 7 with iOS 14.1 where we could do some work.
Now imagine 3 people in development sharing one old device because Apple had to pull a smart move again.
Not nice, Cupertino! Not nice! :(

Apple must release next xCode to support iOS 14.2. I am having issue to test any of the application. sad

Apple released Xcode 12.2 RC yesterday, 5 Nov 2020 (same day they released iOS 14.2). I just downloaded the RC here (under the Applications section): https://developer.apple.com/download/

Per the release notes:

Xcode 12.2 RC includes SDKs for iOS 14.2, iPadOS 14.2, tvOS 14.2, watchOS 7.1, and macOS Big Sur 11. The Xcode 12.2 release candidate supports on-device debugging for iOS 9 and later, tvOS 9 and later, and watchOS 2 and later. Xcode 12.2 RC requires a Mac with Apple silicon running macOS Big Sur 11 or later, or an Intel-based Mac running macOS Catalina 10.15.4 or later.

From Xcode 12.2 RC, I am now able to run and debug iOS apps on my iPhone XS (which is running iOS 14.2).

It's maddening how Apple will release iOS updates without releasing the corresponding Xcode updates. This is not the first time. The least they could do is prominently warn us so we don't accidentally update iOS to a version that isn't supported by the released Xcode version.

Thank you very much!!! Could you explain how to install the RC file? I've downloaded it but how do I open and run it as a zip? I'm on a MacBook Air 2020 @elliott-io or anyone who knows PLEASE HELP this IS maddening!! DX<