diff --git a/lib/mtl/device.jl b/lib/mtl/device.jl
index 2931597fc..0747006e4 100644
--- a/lib/mtl/device.jl
+++ b/lib/mtl/device.jl
@@ -91,7 +91,7 @@ MTLDevice(i::Integer) = devices()[i]
 # family
 #
 
-export supports_family, is_m3, is_m2, is_m1
+export supports_family, is_m4, is_m3, is_m2, is_m1
 
 @cenum MTLGPUFamily::NSInteger begin
     MTLGPUFamilyMetal3 = 5001 # Metal 3 support
@@ -121,5 +121,7 @@ is_m1(dev::MTLDevice) = supports_family(dev, MTLGPUFamilyApple7) &&
                         !supports_family(dev, MTLGPUFamilyApple8)
 is_m2(dev::MTLDevice) = supports_family(dev, MTLGPUFamilyApple8) &&
                         !supports_family(dev, MTLGPUFamilyApple9)
-is_m3(dev::MTLDevice) = supports_family(dev, MTLGPUFamilyApple9)
-is_m4(dev::MTLDevice) = supports_family(dev, MTLGPUFamilyApple9)
+is_m3(dev::MTLDevice) = supports_family(dev, MTLGPUFamilyApple9) &&
+                        occursin("M3", String(dev.name))
+is_m4(dev::MTLDevice) = supports_family(dev, MTLGPUFamilyApple9) &&
+                        occursin("M4", String(dev.name))