diff --git a/src/libANGLE/renderer/metal/mtl_format_map.json b/src/libANGLE/renderer/metal/mtl_format_map.json
index 3a752340ea..79408b0245 100644
--- a/src/libANGLE/renderer/metal/mtl_format_map.json
+++ b/src/libANGLE/renderer/metal/mtl_format_map.json
@@ -62,7 +62,6 @@
             "PVRTC1_RGB_4BPP_UNORM_SRGB_BLOCK": "MTLPixelFormatPVRTC_RGB_4BPP_sRGB",
             "PVRTC1_RGBA_2BPP_UNORM_SRGB_BLOCK": "MTLPixelFormatPVRTC_RGBA_2BPP_sRGB",
             "PVRTC1_RGBA_4BPP_UNORM_SRGB_BLOCK": "MTLPixelFormatPVRTC_RGBA_4BPP_sRGB",
-            "ETC1_R8G8B8_UNORM_BLOCK": "MTLPixelFormatETC2_RGB8",
             "ETC2_R8G8B8_UNORM_BLOCK": "MTLPixelFormatETC2_RGB8",
             "ETC2_R8G8B8_SRGB_BLOCK": "MTLPixelFormatETC2_RGB8_sRGB",
             "ETC2_R8G8B8A1_UNORM_BLOCK": "MTLPixelFormatETC2_RGB8A1",
@@ -71,7 +70,7 @@
             "ETC2_R8G8B8A8_SRGB_BLOCK": "MTLPixelFormatEAC_RGBA8_sRGB",
             "EAC_R11_UNORM_BLOCK": "MTLPixelFormatEAC_R11Unorm",
             "EAC_R11_SNORM_BLOCK": "MTLPixelFormatEAC_R11Snorm",
-            "EAC_R11G11_UNORM_BLOCK": "MTLPixelFormatEAC_R11Unorm",
+            "EAC_R11G11_UNORM_BLOCK": "MTLPixelFormatEAC_RG11Unorm",
             "EAC_R11G11_SNORM_BLOCK": "MTLPixelFormatEAC_RG11Snorm"
         },
         "map_mac": {
@@ -111,7 +110,8 @@
         },
         "override_ios": {
             "D24_UNORM_S8_UINT": "D32_FLOAT_S8X24_UINT",
-            "D16_UNORM": "D32_FLOAT"
+            "D16_UNORM": "D32_FLOAT",
+            "ETC1_R8G8B8_UNORM_BLOCK": "ETC2_R8G8B8_UNORM_BLOCK"
         },
         "override_mac": {
             "R5G6B5_UNORM": "R8G8B8A8_UNORM",
diff --git a/src/libANGLE/renderer/metal/mtl_format_table_autogen.mm b/src/libANGLE/renderer/metal/mtl_format_table_autogen.mm
index 11e25e90b8..64555f3278 100644
--- a/src/libANGLE/renderer/metal/mtl_format_table_autogen.mm
+++ b/src/libANGLE/renderer/metal/mtl_format_table_autogen.mm
@@ -968,7 +968,7 @@
 
         case angle::FormatID::EAC_R11G11_UNORM_BLOCK:
 
-            this->metalFormat    = MTLPixelFormatEAC_R11Unorm;
+            this->metalFormat    = MTLPixelFormatEAC_RG11Unorm;
             this->actualFormatId = angle::FormatID::EAC_R11G11_UNORM_BLOCK;
             this->initFunction   = nullptr;
 
@@ -993,15 +993,6 @@
             this->swizzled = false;
             break;
 
-        case angle::FormatID::ETC1_R8G8B8_UNORM_BLOCK:
-
-            this->metalFormat    = MTLPixelFormatETC2_RGB8;
-            this->actualFormatId = angle::FormatID::ETC1_R8G8B8_UNORM_BLOCK;
-            this->initFunction   = nullptr;
-
-            this->swizzled = false;
-            break;
-
         case angle::FormatID::ETC2_R8G8B8A1_SRGB_BLOCK:
 
             this->metalFormat    = MTLPixelFormatETC2_RGB8A1_sRGB;
@@ -1173,6 +1164,15 @@
             this->swizzled = false;
             break;
 
+        case angle::FormatID::ETC1_R8G8B8_UNORM_BLOCK:
+
+            this->metalFormat    = MTLPixelFormatETC2_RGB8;
+            this->actualFormatId = angle::FormatID::ETC2_R8G8B8_UNORM_BLOCK;
+            this->initFunction   = nullptr;
+
+            this->swizzled = false;
+            break;
+
 #endif  // TARGET_OS_OSX || TARGET_OS_MACCATALYST
         default:
             this->metalFormat    = MTLPixelFormatInvalid;
diff --git a/src/libANGLE/renderer/metal/mtl_format_utils.mm b/src/libANGLE/renderer/metal/mtl_format_utils.mm
index d931da887e..3127038402 100644
--- a/src/libANGLE/renderer/metal/mtl_format_utils.mm
+++ b/src/libANGLE/renderer/metal/mtl_format_utils.mm
@@ -142,6 +142,12 @@ void GenerateTextureCapsMap(const FormatTable &formatTable,
         ASSERT(swizzled);
         return false;
     }
+    if (srcFormatId == angle::FormatID::ETC1_R8G8B8_UNORM_BLOCK &&
+        actualFormatId == angle::FormatID::ETC2_R8G8B8_UNORM_BLOCK)
+    {
+        // ETC1 RGB & ETC2 RGB are technically the same.
+        return false;
+    }
     return srcFormatId != actualFormatId;
 }