Mentioning this in a couple different places, but consider Molten (https://moltengl.com/ https://moltengl.com/) for this use case; it's a third party but very h

Mentioning this in a couple different places, but consider Molten (https://moltengl.com/ https://moltengl.com/) for this use case; it's a third party but very high quality reimplementation of Vulkan and OpenGL ES atop Metal. In other words, an easy way to adopt metal without actually porting your app.