QML "Text" control doesn't work on Mac Pro when using the default "Text.QtRendering" render type. While there is no problem on other platforms or when setting "renderType" to "Text.NativeRendering".

When I run application writed with QML on the newest Mac Pro, some text can't be displayed correctly. On other platforms, there is no problem. And when I set the property "renderType" of "Text" control to "Text.NativeRendering", it works on all platforms I tested. But it looks pixelated when using "NativeRendering". Could you help me?

Here is the detailed information of the Mac Pro:

And the snapshot of the text displayed on it: