Fix color video performance on macOS 10.15+

TomHarte / CLK

A latency-hating emulator of: the Acorn Electron and Archimedes, Amstrad CPC, Apple II/II+/IIe and early Macintosh, Atari 2600 and ST, ColecoVision, Enterprise 64/128, Commodore Vic-20 and Amiga, MSX 1/2, Oric 1/Atmos, early PC compatibles, Sega Master System, Sinclair ZX80/81 and ZX Spectrum.

MIT License

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Fix color video performance on macOS 10.15+ #1308

Closed ryandesign closed 5 months ago

ryandesign commented 5 months ago

Closes #1178

I don't know why this fixes it but it does.

Thanks to @RRyanClark for suggesting I look in the area of code that calls MTLCreateSystemDefaultDevice.

TomHarte commented 5 months ago

In net: don't prefer the preferred device. Thanks!