diff --git a/.github/workflows/alpha-releases.yml b/.github/workflows/alpha-releases.yml
index d8c8a45c14a..ec8c33043db 100644
--- a/.github/workflows/alpha-releases.yml
+++ b/.github/workflows/alpha-releases.yml
@@ -2,7 +2,7 @@ name: Alpha Releases
 
 on:
   schedule:
-    - cron:  '0 20 * * 3' # weekly (Wednesday)
+    - cron: '0 20 * * 3' # weekly (Wednesday)
 
 jobs:
   test:
@@ -12,7 +12,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
         with:
-          node-version: 12.x
+          node-version: 14.x
           cache: yarn
       - name: install dependencies
         run: yarn install --frozen-lockfile --non-interactive
@@ -34,7 +34,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
         with:
-          node-version: 12.x
+          node-version: 14.x
           cache: yarn
           registry-url: 'https://registry.npmjs.org'
       - name: install dependencies
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c20a33eb655..a087873d136 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -3,7 +3,7 @@ name: CI
 on:
   push:
     branches:
-      - master
+      - main
       - beta
       - release
       # release branches
@@ -25,7 +25,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
         with:
-          node-version: 12.x
+          node-version: 14.x
           cache: yarn
       - name: install dependencies
         run: yarn install --frozen-lockfile --non-interactive
@@ -39,7 +39,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
         with:
-          node-version: 12.x
+          node-version: 14.x
           cache: yarn
       - name: install dependencies
         run: yarn install --frozen-lockfile --non-interactive
@@ -66,7 +66,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
         with:
-          node-version: 12.x
+          node-version: 14.x
           cache: yarn
       - name: install dependencies
         run: yarn install --frozen-lockfile --non-interactive
@@ -92,7 +92,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v2
         with:
-          node-version: 12.x
+          node-version: 14.x
           cache: yarn
       - name: install dependencies
         run: yarn install --frozen-lockfile --non-interactive
@@ -115,7 +115,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
         with:
-          node-version: 12.x
+          node-version: 14.x
           cache: yarn
       - name: install dependencies
         run: yarn install --frozen-lockfile --non-interactive
@@ -135,7 +135,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
         with:
-          node-version: 12.x
+          node-version: 14.x
           cache: yarn
       - name: install dependencies
         run: yarn install --frozen-lockfile --non-interactive
@@ -156,7 +156,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
         with:
-          node-version: 12.x
+          node-version: 14.x
           cache: yarn
       - name: install dependencies
         run: yarn install --frozen-lockfile --non-interactive
@@ -177,7 +177,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
         with:
-          node-version: 12.x
+          node-version: 14.x
           cache: yarn
       - name: install dependencies
         run: yarn install --frozen-lockfile --non-interactive
@@ -198,7 +198,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
         with:
-          node-version: 12.x
+          node-version: 14.x
           cache: yarn
       - name: install dependencies
         run: yarn install --frozen-lockfile --non-interactive
@@ -217,7 +217,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
         with:
-          node-version: 12.x
+          node-version: 14.x
           cache: yarn
       - name: install dependencies
         run: yarn install --frozen-lockfile --non-interactive
@@ -236,13 +236,24 @@ jobs:
   deploy-tag:
     name: Deploy tags to npm
     runs-on: ubuntu-latest
-    needs: [basic-test, lint, browserstack-test, production-test, production-debug-render-test, extend-prototypes-test, node-test, blueprint-test, browser-test]
+    needs:
+      [
+        basic-test,
+        lint,
+        browserstack-test,
+        production-test,
+        production-debug-render-test,
+        extend-prototypes-test,
+        node-test,
+        blueprint-test,
+        browser-test,
+      ]
     if: startsWith(github.ref, 'refs/tags/v')
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
         with:
-          node-version: 12.x
+          node-version: 14.x
           registry-url: 'https://registry.npmjs.org'
           cache: yarn
       - name: install dependencies
@@ -257,14 +268,25 @@ jobs:
   publish:
     name: Publish channel to s3
     runs-on: ubuntu-latest
-    needs: [basic-test, lint, browserstack-test, production-test, production-debug-render-test, extend-prototypes-test, node-test, blueprint-test, browser-test]
+    needs:
+      [
+        basic-test,
+        lint,
+        browserstack-test,
+        production-test,
+        production-debug-render-test,
+        extend-prototypes-test,
+        node-test,
+        blueprint-test,
+        browser-test,
+      ]
     # Only run on pushes to branches that are not from the cron workflow
     if: github.event_name == 'push' && contains(github.ref, 'cron') != true
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
         with:
-          node-version: 12.x
+          node-version: 14.x
           cache: yarn
       - name: install dependencies
         run: yarn install --frozen-lockfile --non-interactive
@@ -280,14 +302,25 @@ jobs:
   publish-alpha:
     name: Publish alpha from default branch
     runs-on: ubuntu-latest
-    needs: [basic-test, lint, browserstack-test, production-test, production-debug-render-test, extend-prototypes-test, node-test, blueprint-test, browser-test]
-    # Only run on pushes to master
-    if: github.event_name == 'push' && github.ref == 'refs/heads/master'
+    needs:
+      [
+        basic-test,
+        lint,
+        browserstack-test,
+        production-test,
+        production-debug-render-test,
+        extend-prototypes-test,
+        node-test,
+        blueprint-test,
+        browser-test,
+      ]
+    # Only run on pushes to main
+    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
         with:
-          node-version: 12.x
+          node-version: 14.x
           cache: yarn
       - name: install dependencies
         run: yarn install --frozen-lockfile --non-interactive
@@ -301,4 +334,3 @@ jobs:
           S3_BUCKET_NAME: 'builds.emberjs.com'
           S3_SECRET_ACCESS_KEY: ${{ secrets.S3_SECRET_ACCESS_KEY}}
           S3_ACCESS_KEY_ID: ${{ secrets.S3_ACCESS_KEY_ID}}
-
diff --git a/.github/workflows/cron.yml b/.github/workflows/cron.yml
index 62bd699eb23..66f48888426 100644
--- a/.github/workflows/cron.yml
+++ b/.github/workflows/cron.yml
@@ -2,7 +2,7 @@ name: Cron
 
 on:
   schedule:
-    - cron:  '0 7 * * *' # daily, 7am
+    - cron: '0 7 * * *' # daily, 7am
 
 jobs:
   trigger-ci:
@@ -12,7 +12,7 @@ jobs:
       fail-fast: false
       matrix:
         branch:
-          - master
+          - main
           - beta
           - release
     steps:
diff --git a/package.json b/package.json
index 42200a178ae..4d1d95d926f 100644
--- a/package.json
+++ b/package.json
@@ -155,7 +155,7 @@
     "typescript": "~4.6.0"
   },
   "engines": {
-    "node": ">= 12.*"
+    "node": ">= 14.*"
   },
   "ember-addon": {
     "after": "ember-cli-legacy-blueprints"
diff --git a/packages/@ember/-internals/metal/lib/mixin.ts b/packages/@ember/-internals/metal/lib/mixin.ts
index eb2302f1cc0..7f09aa2ef6c 100644
--- a/packages/@ember/-internals/metal/lib/mixin.ts
+++ b/packages/@ember/-internals/metal/lib/mixin.ts
@@ -27,6 +27,7 @@ import {
   descriptorForDecorator,
   makeComputedDecorator,
   nativeDescDecorator,
+  isClassicDecorator,
 } from './decorator';
 import { addListener, removeListener } from './events';
 import expandProperties from './expand_properties';
@@ -230,7 +231,7 @@ function mergeMixins(
   keys: string[],
   keysWithSuper: string[]
 ): void {
-  let currentMixin;
+  let currentMixin: MixinLike | undefined;
 
   for (let i = 0; i < mixins.length; i++) {
     currentMixin = mixins[i];
@@ -304,12 +305,17 @@ function mergeProps(
       let desc = meta.peekDescriptors(key);
 
       if (desc === undefined) {
-        // The superclass did not have a CP, which means it may have
-        // observers or listeners on that property.
-        let prev = (values[key] = base[key]);
-
-        if (typeof prev === 'function') {
-          updateObserversAndListeners(base, key, prev, false);
+        // If the value is a classic decorator, we don't want to actually
+        // access it, because that will execute the decorator while we're
+        // building the class.
+        if (!isClassicDecorator(value)) {
+          // The superclass did not have a CP, which means it may have
+          // observers or listeners on that property.
+          let prev = (values[key] = base[key]);
+
+          if (typeof prev === 'function') {
+            updateObserversAndListeners(base, key, prev, false);
+          }
         }
       } else {
         descs[key] = desc;
diff --git a/packages/@ember/-internals/runtime/tests/mixins/accessor_test.js b/packages/@ember/-internals/runtime/tests/mixins/accessor_test.js
new file mode 100644
index 00000000000..e7d3e04cdd3
--- /dev/null
+++ b/packages/@ember/-internals/runtime/tests/mixins/accessor_test.js
@@ -0,0 +1,56 @@
+import EmberObject from '@ember/object';
+import { moduleFor, RenderingTestCase } from 'internal-test-helpers';
+
+moduleFor(
+  'runtime: Mixin Accessors',
+  class extends RenderingTestCase {
+    ['@test works with getters'](assert) {
+      let value = 'building';
+
+      let Base = EmberObject.extend({
+        get foo() {
+          if (value === 'building') {
+            throw Error('base should not be called yet');
+          }
+
+          return "base's foo";
+        },
+      });
+
+      // force Base to be finalized so its properties will contain `foo`
+      Base.proto();
+
+      class Child extends Base {
+        get foo() {
+          if (value === 'building') {
+            throw Error('child should not be called yet');
+          }
+
+          return "child's foo";
+        }
+      }
+
+      Child.proto();
+
+      let Grandchild = Child.extend({
+        get foo() {
+          if (value === 'building') {
+            throw Error('grandchild should not be called yet');
+          }
+
+          return value;
+        },
+      });
+
+      let instance = Grandchild.create();
+
+      value = 'done building';
+
+      assert.equal(instance.foo, 'done building', 'getter defined correctly');
+
+      value = 'changed value';
+
+      assert.equal(instance.foo, 'changed value', 'the value is a real getter, not a snapshot');
+    }
+  }
+);
diff --git a/smoke-tests/ember-test-app/package.json b/smoke-tests/ember-test-app/package.json
index 3fe46b8a49d..1aa0f9bad4c 100644
--- a/smoke-tests/ember-test-app/package.json
+++ b/smoke-tests/ember-test-app/package.json
@@ -63,7 +63,7 @@
     "webpack": "^5.65.0"
   },
   "engines": {
-    "node": "12.* || 14.* || >= 16"
+    "node": "14.* || 16.* || >= 18"
   },
   "ember": {
     "edition": "octane"