diff --git a/WORKSPACE b/WORKSPACE
index 5059f97d0..b8a1d9dd0 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -120,7 +120,9 @@ http_archive(
 load("@org_tensorflow//tensorflow:workspace.bzl", "tf_workspace")
 tf_workspace(tf_repo_name = "org_tensorflow")
 
-# Please run $ sudo apt-get install libopencv-dev
+# Please run
+# $ sudo apt-get install libopencv-core-dev libopencv-highgui-dev \
+#                        libopencv-imgproc-dev libopencv-video-dev
 new_local_repository(
     name = "linux_opencv",
     build_file = "@//third_party:opencv_linux.BUILD",
@@ -133,7 +135,7 @@ new_local_repository(
     path = "/usr"
 )
 
-# Please run $ brew install opencv
+# Please run $ brew install opencv@3
 new_local_repository(
     name = "macos_opencv",
     build_file = "@//third_party:opencv_macos.BUILD",
diff --git a/mediapipe/docs/install.md b/mediapipe/docs/install.md
index 07f1e48e8..2905be816 100644
--- a/mediapipe/docs/install.md
+++ b/mediapipe/docs/install.md
@@ -8,9 +8,10 @@ Note: If you plan to use TensorFlow calculators and example apps, there is a
 known issue with gcc and g++ version 6.3 and 7.3. Please use other versions.
 
 Note: While Mediapipe configuring TensorFlow with Python 2, if you see the
-following error: "org_tensorflow/third_party/git/git_configure.bzl", line 14, in
-_fail fail(("%sGit Configuration Error:%s %...)))", please install the python
-future library by `$ pip install --user future `
+following error:
+'"/private/var/.../org_tensorflow/third_party/git/git_configure.bzl", line 14,
+in _fail fail(("%sGit Configuration Error:%s %...)))', please install the python
+future library by `$ pip install --user future`
 
 Choose your operating system:
 
@@ -243,23 +244,17 @@ To build and run iOS apps:
 4.  Install OpenCV and FFmpeg.
 
     Option 1. Use HomeBrew package manager tool to install the pre-compiled
-    OpenCV libraries. FFmpeg will be installed via OpenCV.
+    OpenCV 3.4.5 libraries. FFmpeg will be installed via OpenCV.
 
     ```bash
-    $ brew install opencv
-
-    # A Known issue with OpenCV 4.1.1 or above:
-    # If you see a missing dependency declaration error when building mediapipe target,
-    # you may need to uninstall glog as a temporary workaround. The error message looks like:
-    # ERROR: this rule is missing dependency declarations for the following files included
-    # by 'mediapipe/calculators/image/scale_image_utils.cc':
-    # '/usr/local/include/glog/logging.h'
-    # '/usr/local/include/glog/log_severity.h'
-    # '/usr/local/include/glog/vlog_is_on.h'
-    $ brew uninstall --ignore-dependencies glog
-    $ bazel clean --expunge
+    $ brew install opencv@3
     ```
 
+    Note: If you do `$brew install opencv`, there is a known issue caused by the
+    glog dependency of OpenCV 4.1.1 or above. The problem is solvable by
+    uninstalling the glog. You need to do `$ brew uninstall
+    --ignore-dependencies glog`
+
     Option 2. Use MacPorts package manager tool to install the OpenCV libraries.
 
     ```bash
diff --git a/third_party/opencv_macos.BUILD b/third_party/opencv_macos.BUILD
index 362e61c60..275f31ec0 100644
--- a/third_party/opencv_macos.BUILD
+++ b/third_party/opencv_macos.BUILD
@@ -6,23 +6,22 @@ licenses(["notice"])  # BSD license
 exports_files(["LICENSE"])
 
 # The following build rule assumes that OpenCV is installed by
-# 'brew install opencv' command on macos.
+# 'brew install opencv@3' command on macos.
 # If you install OpenCV separately, please modify the build rule accordingly.
 cc_library(
     name = "opencv",
     srcs = glob(
         [
-            "local/opt/opencv/lib/libopencv_core.dylib",
-            "local/opt/opencv/lib/libopencv_highgui.dylib",
-            "local/opt/opencv/lib/libopencv_imgcodecs.dylib",
-            "local/opt/opencv/lib/libopencv_imgproc.dylib",
-            "local/opt/opencv/lib/libopencv_optflow.dylib",
-            "local/opt/opencv/lib/libopencv_video.dylib",
-            "local/opt/opencv/lib/libopencv_videoio.dylib",
+            "local/opt/opencv@3/lib/libopencv_core.dylib",
+            "local/opt/opencv@3/lib/libopencv_highgui.dylib",
+            "local/opt/opencv@3/lib/libopencv_imgcodecs.dylib",
+            "local/opt/opencv@3/lib/libopencv_imgproc.dylib",
+            "local/opt/opencv@3/lib/libopencv_video.dylib",
+            "local/opt/opencv@3/lib/libopencv_videoio.dylib",
         ],
     ),
-    hdrs = glob(["local/opt/opencv/include/opencv4/**/*.h*"]),
-    includes = ["local/opt/opencv/include/opencv4/"],
+    hdrs = glob(["local/opt/opencv@3/include/opencv2/**/*.h*"]),
+    includes = ["local/opt/opencv@3/include/"],
     linkstatic = 1,
     visibility = ["//visibility:public"],
 )