Fix missing family check flag (#5754)

Co-authored-by: Jim Blandy <jimb@red-bean.com>
Co-authored-by: Xiaopeng Li <x.friday@outlook.com>
Co-authored-by: Connor Fitzgerald <connorwadefitzgerald@gmail.com>
Co-authored-by: Samson <16504129+sagudev@users.noreply.github.com>
Co-authored-by: Valaphee The Meerkat <32491319+valaphee@users.noreply.github.com>
Co-authored-by: Andreas Reich <r_andreas2@web.de>

CHANGELOG.md

@@ -96,6 +96,10 @@ By @stefnotch in [#5410](https://github.com/gfx-rs/wgpu/pull/5410)
 
 - Ensure render pipelines have at least 1 target. By @ErichDonGubler in [#5715](https://github.com/gfx-rs/wgpu/pull/5715)
 
+#### Metal
+
+- Fix unrecognized selector crash on iOS 12. By @vladasz in [#5744](https://github.com/gfx-rs/wgpu/pull/5744).
+
 #### Vulkan
 
 - Fix enablement of subgroup ops extension on Vulkan devices that don't support Vulkan 1.3. By @cwfitzgerald in [#5624](https://github.com/gfx-rs/wgpu/pull/5624).

wgpu-hal/src/metal/adapter.rs

@@ -736,7 +736,9 @@ impl super::PrivateCapabilities {
                 4
             },
             // Per https://developer.apple.com/metal/Metal-Feature-Set-Tables.pdf
-            max_color_attachment_bytes_per_sample: if device.supports_family(MTLGPUFamily::Apple4) {
+            max_color_attachment_bytes_per_sample: if family_check
+                && device.supports_family(MTLGPUFamily::Apple4)
+            {
                 64
             } else {
                 32