Resolving platform SDK Warning on macOS

ericg_97477

I am getting the following warnings:

Project WARNING: Qt has only been tested with version 10.15 of the platform SDK, you're using 11.0.
Project WARNING: This is an unsupported configuration. You may experience build issues, and by using
Project WARNING: the 11.0 SDK you are opting in to new features that Qt has not been prepared for.
Project WARNING: Please downgrade the SDK you use to build your app to version 10.15, or configure
Project WARNING: with CONFIG+=sdk_no_version_check when running qmake to silence this warning.

I am not sure how to resolve this problem.

I am using:

Qt Creator 4.13.2
Based on Qt 5.15.1 (Clang 11.0 (Apple), 64 bit)
Built on Oct 1 2020 01:16:45

I have Xcode Version 12.2 (12B45b) installed.

$ xcodebuild -showsdks
iOS SDKs:
	iOS 14.2                      	-sdk iphoneos14.2

iOS Simulator SDKs:
	Simulator - iOS 14.2          	-sdk iphonesimulator14.2

macOS SDKs:
	DriverKit 20.0                	-sdk driverkit.macosx20.0
	macOS 11.0                    	-sdk macosx11.0

tvOS SDKs:
	tvOS 14.2                     	-sdk appletvos14.2

tvOS Simulator SDKs:
	Simulator - tvOS 14.2         	-sdk appletvsimulator14.2

watchOS SDKs:
	watchOS 7.1                   	-sdk watchos7.1

watchOS Simulator SDKs:
	Simulator - watchOS 7.1       	-sdk watchsimulator7.1

I assume the warning is based on finding: macOS 11.0 -sdk macosx11.0

When I ran the Qt installer, I selected the Qt version 5.12.10 of the components.

If more information is required, please let me know.

Suggestions?

ericg_97477

I downloaded Xcode 11.7 and executed

sudo xcode-select -s /Applications/Xcode_11_7.app/Contents/Developer

xcodebuild -showsdks then shows macOS 10.15 -sdk macosx10.15.

However, Qt Creator does not honor what is selected with xcode-select.

The solution appears to be:

go to Projects -> Build & Run -> Desktop Qt 5.12.10 clang 64.bit -> Build.
go to the Build Environment section and edit the PATH.

The path will contain

/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin

I changed it to:

/Applications/Xcode_11_7.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin

which is the location where I installed Xcode 11.7.

The warnings have disappeared.

If there is a better solution or something I have missed, I would be interested.

If someone can confirm this is the correct solution, that would be appreciated.

Edward LeBlanc

There are complete instructions for downloading, finding and installing older SDKs in newer XCode versions in this answer on Stack Overflow:

https://stackoverflow.com/questions/65952224/qtcreator-fails-on-macos-sdk-11-1/66497078#66497078