diff --git a/.github/workflows/analysis-coverage.yml b/.github/workflows/analysis-coverage.yml
index cafc6535..3b2d88cf 100644
--- a/.github/workflows/analysis-coverage.yml
+++ b/.github/workflows/analysis-coverage.yml
@@ -90,6 +90,8 @@ jobs:
   coverage-macos:
     runs-on: macos-12
     name: Coverage(macOS)
+    env:
+      TEST_DECODE_THREADS: 0    # Till `brew` update to `1.14.1`
 
     steps:
       - uses: actions/checkout@v3
@@ -188,6 +190,8 @@ jobs:
   coverage-pi-heif:
     runs-on: macos-12
     name: Pi-Heif Coverage(macOS)
+    env:
+      TEST_DECODE_THREADS: 0    # Till `brew` update to `1.14.1`
 
     steps:
       - uses: actions/checkout@v3
@@ -236,6 +240,7 @@ jobs:
     env:
       EXP_PH_LIBHEIF_VERSION: ""
       PH_LIGHT_ACTION: 1
+      TEST_DECODE_THREADS: 0    # Till `brew` update to `1.14.1`
 
     steps:
       - uses: actions/checkout@v3
diff --git a/.github/workflows/publish-pypi-pi_heif.yml b/.github/workflows/publish-pypi-pi_heif.yml
index b9d1da74..548a424d 100644
--- a/.github/workflows/publish-pypi-pi_heif.yml
+++ b/.github/workflows/publish-pypi-pi_heif.yml
@@ -80,7 +80,7 @@ jobs:
           CIBW_BUILD: "*-macosx_x86_64"
           CIBW_SKIP: "cp36-* pp39-*"
           CIBW_TEST_SKIP: "cp311-*"
-          CIBW_ENVIRONMENT_MACOS: PH_LIGHT_ACTION=1
+          CIBW_ENVIRONMENT_MACOS: PH_LIGHT_ACTION=1 TEST_DECODE_THREADS=0
 
       - name: Checking built wheels
         run: |
diff --git a/.github/workflows/publish-pypi.yml b/.github/workflows/publish-pypi.yml
index 92ed2090..85c3f66e 100644
--- a/.github/workflows/publish-pypi.yml
+++ b/.github/workflows/publish-pypi.yml
@@ -106,7 +106,7 @@ jobs:
           CIBW_BUILD: "*-macosx_x86_64"
           CIBW_SKIP: "cp36-* pp39-*"
           CIBW_TEST_SKIP: "cp311-*"
-          CIBW_ENVIRONMENT_MACOS: PH_FULL_ACTION=1
+          CIBW_ENVIRONMENT_MACOS: PH_FULL_ACTION=1 TEST_DECODE_THREADS=0
 
       - name: Check built wheels
         run: |
diff --git a/pillow_heif/options.py b/pillow_heif/options.py
index 560de223..b87a284a 100644
--- a/pillow_heif/options.py
+++ b/pillow_heif/options.py
@@ -6,7 +6,9 @@
 DECODE_THREADS = 4
 """Maximum number of threads to use for decoding images(when it is possible)
 
-When use pillow_heif as a plugin you can set it with: `register_*_opener(decode_threads=8)`"""
+When use pillow_heif as a plugin you can set it with: `register_*_opener(decode_threads=8)`
+
+.. note:: Currently do not work on macOS, will be fixed in `0.9.1` version"""
 
 
 THUMBNAILS = True
diff --git a/tests/options_test.py b/tests/options_test.py
index 4cf25143..83ef9cc5 100644
--- a/tests/options_test.py
+++ b/tests/options_test.py
@@ -83,12 +83,12 @@ def test_decode_threads():
         start_time_one_thread = perf_counter()
         open_heif(test_image, convert_hdr_to_8bit=False).load()
         total_time_one_thread = perf_counter() - start_time_one_thread
-        options.DECODE_THREADS = 2
-        start_time_two_threads = perf_counter()
+        options.DECODE_THREADS = os.cpu_count()
+        start_time_multiply_threads = perf_counter()
         open_heif(test_image, convert_hdr_to_8bit=False).load()
-        total_time_two_threads = perf_counter() - start_time_two_threads
-        # decoding in two threads should be faster at least by 8%
-        assert total_time_one_thread > total_time_two_threads * 1.08
+        total_time_multiply_threads = perf_counter() - start_time_multiply_threads
+        # decoding in multiply threads should be faster at least by 15%
+        assert total_time_one_thread > total_time_multiply_threads * 1.15
     finally:
         options.DECODE_THREADS = 4