Clarify supported Apple deployment targets for SDL 3.0

docs/README-ios.md

@@ -1,10 +1,10 @@
 iOS
 ======
 
-Building the Simple DirectMedia Layer for iOS 11.0+
+Building the Simple DirectMedia Layer
 ==============================================================================
 
-Please note that building SDL requires at least Xcode 12.2 and the iOS 14.2 SDK.
+SDL supports building with Xcode 12.2 and the iOS 14.2 SDK or newer, and deploying to iOS 11.0, tvOS 11.0, visionOS 1.3, and newer.
 
 Instructions:
 

docs/README-macos.md

@@ -6,6 +6,8 @@ From the developer's point of view, macOS is a sort of hybrid Mac and
 Unix system, and you have the option of using either traditional
 command line tools or Apple's IDE Xcode.
 
+SDL supports building with Xcode 12.2 and the macOS 11.0 SDK or newer, and deploying to macOS 10.13 and newer.
+
 # Command Line Build
 
 To build SDL using the command line, use the CMake build script:
@@ -30,8 +32,6 @@ cmake --build .
 sudo cmake --install .
 ```
 
-Please note that building SDL requires at least Xcode 12.2 and the macOS 11.0 SDK.
-
 If you are getting errors building SDL_mfijoystick.m with Xcode 12.2, find your SDKs
 directory and move MacOSX10.15.sdk out of the way so it isn't accidentally being used
 by the build environment.