Fix missing family check flag (#5744)

* fix: missed family check flag

* fix: fmt and changelog

CHANGELOG.md

@@ -46,6 +46,10 @@ Bottom level categories:
 - Clean up weak references to texture views and bind groups to prevent memory leaks. By @xiaopengli89 in [#5595](https://github.com/gfx-rs/wgpu/pull/5595).
 - Fix segfault on exit is queue & device are dropped before surface. By @sagudev in [#5640](https://github.com/gfx-rs/wgpu/pull/5640).
 
+#### 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

@@ -738,7 +738,9 @@ 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