diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 88b2873b..d965aad5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,7 +10,7 @@ jobs:
 
   build:
     name: Build jupyterlab (no kernels)
-    runs-on: ubuntu-latest
+    runs-on: [ubuntu-latest, macos-latest]
 
     outputs:
       kernels: ${{ steps.kernels.outputs.kernels }}
@@ -33,15 +33,15 @@ jobs:
         filterKernels=$(echo $kernels | nix run nixpkgs#jq -- -c '[.[] | select(. | contains("jupyterlab-kernel-example-")) | ltrimstr("jupyterlab-kernel-")]')
         echo "kernels=$filterKernels" >> $GITHUB_OUTPUT
 
-    - name: Check
-      run: |
-        nix flake check --show-trace -L
+#    - name: Check
+#      run: |
+#        nix flake check --show-trace -L
 
 
   build-kernel:
     name: Build ${{ matrix.kernel }} kernel
     needs: build
-    runs-on: ubuntu-latest
+    runs-on: [ubuntu-latest, macos-latest]
 
     strategy:
       fail-fast: false
@@ -76,7 +76,7 @@ jobs:
   build-all-kernels:
     name: Build all kernels
     needs: build-kernel
-    runs-on: ubuntu-latest
+    runs-on: [ubuntu-latest, macos-latest]
 
     steps:
     - uses: actions/checkout@v3
@@ -95,7 +95,7 @@ jobs:
   build-devshell:
     name: Build devshell
     needs: build-kernel
-    runs-on: ubuntu-latest
+    runs-on: [ubuntu-latest, macos-latest]
 
     steps:
     - uses: actions/checkout@v3
@@ -114,7 +114,7 @@ jobs:
   build-docs:
     name: Build docs
     needs: build-kernel
-    runs-on: ubuntu-latest
+    runs-on: [ubuntu-latest, macos-latest]
 
     steps:
     - uses: actions/checkout@v3
@@ -153,7 +153,7 @@ jobs:
   template:
     name: Test a template
     needs: build-kernel
-    runs-on: ubuntu-latest
+    runs-on: [ubuntu-latest, macos-latest]
 
     steps:
     - uses: actions/checkout@v3
diff --git a/flake.nix b/flake.nix
index eaa421e4..edca84a1 100644
--- a/flake.nix
+++ b/flake.nix
@@ -50,8 +50,7 @@
 
     SYSTEMS = [
       flake-utils.lib.system.x86_64-linux
-      # TODO - Fix linux first and then get macos working.
-      # flake-utils.lib.system.x86_64-darwin
+      flake-utils.lib.system.x86_64-darwin
     ];
 
     /*