diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 3fdc5fd76..c958961a4 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -7,11 +7,10 @@ on: [pull_request]
 
 jobs:
   build:
-    # TODO (#2114): re-enable osx build.
-    runs-on: ubuntu-latest
-
+    runs-on: ${{ matrix.os }}
     strategy:
       matrix:
+        os: [ubuntu-latest, macos-latest]
         node-version: [12.x, 14.x, 16.x]
         # See supported Node.js release schedule at https://nodejs.org/en/about/releases/