XCode wouldnt deploy to my phone with ios 10.3 but it worked on 10.2. So I decided to update XCode.

XCode wont let me update becase "Xcode can’t be installed on “Macintosh HD” because OS X version 10.12 or later is required."

Ok, I thought.

I update my computer to the most recent version in the AppStore Update section and I get OS X Version 10.11.6 .

Still wont let me update XCode.

I find verison 10.12.1 on Apples website which said it was the most recent version and decide to download it separately and update it seperately.

Geuss what.

"This update requires OS X version 10.12."

'

So I cant update XCode because I have version 10.11.6 but I cant update to 10.12.1 without updating to 10.12 first which 10.12 is not found in the AppStore.

What are you doing Apple?

Any suggestions are apprecianted, Thanks.

Yes my mac can handle the new update it is a MacBook Air from 2014

I'm experiencing the same issue. I'm attempting to upgrade from El Capitan 10.11.6 to some (any) version of Sierra, to facilitate an upgrade of XCode, to be able to test an iOS 11 simulator.

I am unable to get past step 1 of upgrading to any version of Sierra. There are no updates in the App Store - selecting "Software Update" in "About this Mac" has also yielded a "No Updates Available" message. To attempt a workaround, I downloaded the v 10.12.1 package installer, which gave me the error message "This update requires OS X version 10.12." - to my knowledge, no such version exists.

Every subsequent version of Sierra I attempt to update with, including the 'combo' packages, is giving me the same error. So essentially, there is no way to upgrade to Sierra now?

This is part of a comedy of compatibility errors, as the entire endeavor has been in order to use the beta version of XCode, as the version in the App Store gets stuck in an infinite loop and won't even download! This is on a MacBook Pro (Retina, 15-inch, Mid 2015) - not sure if anyone else has had any luck.

Base OSs are only available from the MAS for those that downloaded them in the past. Go there, check your history. If you don't have the base in your history, you can't get it on demand/at will as new installs are no longer being signed.

Your computer should support macOS High Sierra ( which is not a Sierra update ), which is in the MAS now - installing it will then provide you with support for iOS 11.x simulator.

If you need further macOS installation details, try the public macOS forums: https://support.apple.com/

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