diff --git a/source/blender/gpu/metal/mtl_texture.mm b/source/blender/gpu/metal/mtl_texture.mm
index ee14026bd5b..08097e81e70 100644
--- a/source/blender/gpu/metal/mtl_texture.mm
+++ b/source/blender/gpu/metal/mtl_texture.mm
@@ -1122,6 +1122,8 @@ void gpu::MTLTexture::update_sub(
     /* Decrement texture reference counts. This ensures temporary texture views are released. */
     [texture_handle release];
 
+    ctx->main_command_buffer.submit(false);
+
     /* Release temporary staging buffer allocation.
      * NOTE: Allocation will be tracked with command submission and released once no longer in use.
      */
diff --git a/source/blender/render/intern/compositor.cc b/source/blender/render/intern/compositor.cc
index 0c4bf9b01c3..662b6082112 100644
--- a/source/blender/render/intern/compositor.cc
+++ b/source/blender/render/intern/compositor.cc
@@ -508,13 +508,6 @@ class RealtimeCompositor {
      * to avoid them blocking each other. */
     BLI_assert(!BLI_thread_is_main() || G.background);
 
-    /* The realtime compositor uses GPU module and does not rely on the draw manager, or its global
-     * state. This means that activation of GPU context does not require lock of the main thread.
-     *
-     * However, while this has been tested on Linux and works well, on macOS it causes to
-     * spontaneous invalid colors in the composite output. The Windows has not been extensively
-     * tested yet. */
-#if defined(__linux__) || defined(_WIN32)
     if (G.background) {
       /* In the background mode the system context of the render engine might be nullptr, which
        * forces some code paths which more tightly couple it with the draw manager.
@@ -529,9 +522,6 @@ class RealtimeCompositor {
     GPU_render_begin();
     WM_system_gpu_context_activate(re_system_gpu_context);
     GPU_context_active_set(static_cast<GPUContext *>(re_blender_gpu_context));
-#else
-    DRW_render_context_enable(&render_);
-#endif
 
     context_->update_input_data(input_data);
 
@@ -546,14 +536,10 @@ class RealtimeCompositor {
     context_->viewer_output_to_viewer_image();
     texture_pool_->free_unused_and_reset();
 
-#if defined(__linux__) || defined(_WIN32)
     GPU_flush();
     GPU_render_end();
     GPU_context_active_set(nullptr);
     WM_system_gpu_context_release(re_system_gpu_context);
-#else
-    DRW_render_context_disable(&render_);
-#endif
   }
 };