MacOS: Rendering with weird results

[l0go]

Describe the bug When anything is drawn on the MacOS target (Metal/OpenGL). HTML5 target is fine. A line is drawn to the bottom right instead of the proper output. A family member thought it looked like a shooting star. Screenshots are better than my poor quality explanation, so look at those instead!

To Reproduce Steps to reproduce the behavior:

1. Get sample and clone Kha (2fdb9550e0190c04af3f5d6186bcfdc12cab2758)
2. Compile using node Kha/make osx -compile
3. Run the compiled executable located in build/osx-build/build/
4. See error

Expected behavior A simple white outlined rectangle on a black background. The below screenshot was taken on the HTML5 target.

Screenshots Chess from Kha-Samples, the version of Kha included works, just not the latest (2fdb9550e0190c04af3f5d6186bcfdc12cab2758):

Execution Environment:

• Host system: macOS Big Sur 11.3.1
• Target system (where you run your code): macOS Big Sur 11.3.1
• IDE used (if any): xcode-build was used to compile, although I just used vim to write it.
• Kha revision: 2fdb9550e0190c04af3f5d6186bcfdc12cab2758
• Kha build output (Using Kha...): Successful Build
• Application output (if it runs):

  
  Starting Kinc
  Starting application
  deviceBufferSize = 4096

mSampleRate = 44100

mFormatFlags = 00000009

mBytesPerPacket = 8

mFramesPerPacket = 1

mChannelsPerFrame = 2

mBytesPerFrame = 8

mBitsPerChannel = 32

[l0go]

You are awesome! It works!