diff --git a/modules/webm/libvpx/SCsub b/modules/webm/libvpx/SCsub
index 1baa14655cb1..eee35f146de1 100644
--- a/modules/webm/libvpx/SCsub
+++ b/modules/webm/libvpx/SCsub
@@ -227,30 +227,10 @@ webm_multithread = env_libvpx["platform"] != "javascript"
 cpu = env_libvpx["arch"]
 webm_cpu_x86 = False
 webm_cpu_arm = False
-if cpu == "x86_64" or cpu == "arm64" or cpu == "arm32":
-    import os
-    import subprocess
-
-    yasm_paths = [
-        "yasm",
-        "../../../yasm",
-    ]
-
-    yasm_found = False
-
-    devnull = open(os.devnull)
-    for yasm_path in yasm_paths:
-        try:
-            yasm_found = True
-            subprocess.Popen([yasm_path, "--version"], stdout=devnull, stderr=devnull).communicate()
-        except Exception:
-            yasm_found = False
-        if yasm_found:
-            break
-
-    if not yasm_found:
-        webm_cpu_x86 = False
-        print("YASM is necessary for WebM SIMD optimizations.")
+if cpu == "arm64" or cpu == "arm32":
+    webm_cpu_arm = True
+elif cpu == "x86_64":
+    webm_cpu_x86 = True
 
 webm_simd_optimizations = False
 
@@ -283,11 +263,11 @@ if webm_cpu_arm:
         env_libvpx["ASFLAGS"] = ""
         env_libvpx["ASCOM"] = "$AS $ASFLAGS -o $TARGET $SOURCES"
 
-    env_libvpx.Append(CPPDEFINES=["WEBM_ARMASM"])
+    env_libvpx.Append(CPPDEFINES=["WEBM_ARMASM", ""])
 
     webm_simd_optimizations = True
 
-if webm_simd_optimizations == False:
+if not webm_simd_optimizations:
     print("WebM SIMD optimizations are disabled. Check if your CPU architecture, CPU bits or platform are supported!")
 
 env_libvpx.add_source_files(env_libvpx.modules_sources, libvpx_sources)
@@ -320,8 +300,9 @@ if webm_cpu_x86:
 
     env_libvpx.add_source_files(env_libvpx.modules_sources, libvpx_sources_x86asm)
     env_libvpx.add_source_files(env_libvpx.modules_sources, libvpx_sources_x86_64asm)
-elif webm_cpu_arm:
+if webm_cpu_arm:
     env_libvpx.add_source_files(env_libvpx.modules_sources, libvpx_sources_arm)
+
     if env_libvpx["platform"] == "android":
         env_libvpx.Prepend(CPPPATH=[libvpx_dir + "third_party/android"])
         env_libvpx.add_source_files(env_libvpx.modules_sources, [libvpx_dir + "third_party/android/cpu-features.c"])
@@ -329,6 +310,8 @@ elif webm_cpu_arm:
     env_libvpx_neon = env_libvpx.Clone()
     env_libvpx_neon.add_source_files(env_libvpx.modules_sources, libvpx_sources_arm_neon)
 
-    if env_libvpx["platform"] == "iphone":
-        env_libvpx.add_source_files(env_libvpx.modules_sources, libvpx_sources_arm_neon_gas_apple)
-    env_libvpx.add_source_files(env_libvpx.modules_sources, libvpx_sources_arm_neon_gas)
+    if env_libvpx["platform"] == "iphone" or env_libvpx["platform"] == "macos":
+        # env_libvpx.add_source_files(env_libvpx.modules_sources, libvpx_sources_arm_neon_gas_apple)
+        pass
+    else:
+        env_libvpx.add_source_files(env_libvpx.modules_sources, libvpx_sources_arm_neon_gas)
diff --git a/thirdparty/libvpx/vpx_ports/arm_cpudetect.c b/thirdparty/libvpx/vpx_ports/arm_cpudetect.c
index 7eb74a7dc9f5..378a6920b678 100644
--- a/thirdparty/libvpx/vpx_ports/arm_cpudetect.c
+++ b/thirdparty/libvpx/vpx_ports/arm_cpudetect.c
@@ -81,7 +81,7 @@ int arm_cpu_caps(void) {
   return flags & mask;
 }
 
-#elif defined(__ANDROID__) /* end _MSC_VER */
+#elif defined(__ANDROID__) /* end __ANDROID__ */
 #include <cpu-features.h>
 
 int arm_cpu_caps(void) {