diff --git a/dom/media/test/mochitest.ini b/dom/media/test/mochitest.ini
index dc54bd941019..d94d14b32edc 100644
--- a/dom/media/test/mochitest.ini
+++ b/dom/media/test/mochitest.ini
@@ -779,7 +779,7 @@ skip-if = (android_version == '25' && debug) # android(bug 1232305)
 [test_capture_stream_av_sync.html]
 skip-if =
     toolkit == 'android' # 1712598 (canvas error)
-    (verify && os == 'mac') # 1517199 (timeout-on-osx)
+    (os == 'mac') # 1517199 (timeout-on-osx)
     (os == "linux") # 1713397, 1719881 (high intermittent failure on linux tsan), 1776937
     apple_silicon # Disabled due to bleedover with other tests when run in regular suites; passes in "failures" jobs
 [test_chaining.html]
diff --git a/layout/reftests/canvas/reftest.list b/layout/reftests/canvas/reftest.list
index 9c08bdd8ee6e..48e2543bb0c6 100644
--- a/layout/reftests/canvas/reftest.list
+++ b/layout/reftests/canvas/reftest.list
@@ -104,9 +104,9 @@ fuzzy(0-1,0-43) == 1201272-1.html 1201272-1-ref.html
 == 1238795-1.html 1238795-1-ref.html
 == 1303534-1.html 1303534-1-ref.html
 
-== 1304353-text-global-alpha-1.html 1304353-text-global-alpha-1-ref.html
+fuzzy-if(cocoaWidget,0-1,0-1410) == 1304353-text-global-alpha-1.html 1304353-text-global-alpha-1-ref.html
 fuzzy-if(winWidget,0-1,0-578) == 1304353-text-global-alpha-2.html 1304353-text-global-alpha-2-ref.html
-fuzzy-if(winWidget,0-94,0-1575) fuzzy-if(cocoaWidget,0-1,0-24) == 1304353-text-global-composite-op-1.html 1304353-text-global-composite-op-1-ref.html
+fuzzy-if(winWidget,0-94,0-1575) fuzzy-if(cocoaWidget,0-1,0-34) == 1304353-text-global-composite-op-1.html 1304353-text-global-composite-op-1-ref.html
 
 == text-indent-1a.html text-indent-1-ref.html
 == text-indent-1b.html text-indent-1-ref.html
diff --git a/modules/libpref/init/StaticPrefList.yaml b/modules/libpref/init/StaticPrefList.yaml
index 23b7ee030037..74f99700b3a0 100644
--- a/modules/libpref/init/StaticPrefList.yaml
+++ b/modules/libpref/init/StaticPrefList.yaml
@@ -5302,8 +5302,8 @@
 
 - name: gfx.canvas.accelerated
   type: RelaxedAtomicBool
-#if defined(XP_LINUX) && !defined(ANDROID) && defined(NIGHTLY_BUILD)
-  value: true
+#if defined(XP_MACOSX) || defined(XP_LINUX) && !defined(ANDROID)
+  value: @IS_NIGHTLY_BUILD@
 #else
   value: false
 #endif
diff --git a/testing/web-platform/meta/css/css-multicol/column-balancing-paged-001-print.html.ini b/testing/web-platform/meta/css/css-multicol/column-balancing-paged-001-print.html.ini
index c2fc2266a34d..bfb0ff4da1f5 100644
--- a/testing/web-platform/meta/css/css-multicol/column-balancing-paged-001-print.html.ini
+++ b/testing/web-platform/meta/css/css-multicol/column-balancing-paged-001-print.html.ini
@@ -1,3 +1,5 @@
 [column-balancing-paged-001-print.html]
+  fuzzy:
+    if os == "mac": maxDifference=0-2;totalPixels=0-438
   expected:
     if (os == "mac") and not debug: [PASS, FAIL]
diff --git a/testing/web-platform/meta/css/css-values/viewport-units-001-print.html.ini b/testing/web-platform/meta/css/css-values/viewport-units-001-print.html.ini
index 13a60d24d401..8fe63807e7be 100644
--- a/testing/web-platform/meta/css/css-values/viewport-units-001-print.html.ini
+++ b/testing/web-platform/meta/css/css-values/viewport-units-001-print.html.ini
@@ -2,3 +2,5 @@
   expected:
     if (os == "win") and not debug: ["PASS", "FAIL", "TIMEOUT"]
     if (os == "mac") and not debug: ["PASS", "FAIL"]
+  fuzzy:
+    if (os == "mac") and debug: maxDifference=0-1;totalPixels=0-2
diff --git a/testing/web-platform/meta/css/geometry/DOMMatrix2DInit-validate-fixup.html.ini b/testing/web-platform/meta/css/geometry/DOMMatrix2DInit-validate-fixup.html.ini
index e747ad6bdf47..580f1814e756 100644
--- a/testing/web-platform/meta/css/geometry/DOMMatrix2DInit-validate-fixup.html.ini
+++ b/testing/web-platform/meta/css/geometry/DOMMatrix2DInit-validate-fixup.html.ini
@@ -2,15 +2,19 @@
   [addPath({b: 2})]
     expected:
       if (os == "linux") and (processor == "x86_64") and nightly_build: FAIL
+      if (os == "mac") and nightly_build: FAIL
 
   [addPath({c: 2})]
     expected:
       if (os == "linux") and (processor == "x86_64") and nightly_build: FAIL
+      if (os == "mac") and nightly_build: FAIL
 
   [addPath({m12: 2})]
     expected:
       if (os == "linux") and (processor == "x86_64") and nightly_build: FAIL
+      if (os == "mac") and nightly_build: FAIL
 
   [addPath({m21: 2})]
     expected:
       if (os == "linux") and (processor == "x86_64") and nightly_build: FAIL
+      if (os == "mac") and nightly_build: FAIL
diff --git a/testing/web-platform/meta/html/canvas/element/manual/drawing-images-to-the-canvas/image-orientation/drawImage-from-blob.tentative.html.ini b/testing/web-platform/meta/html/canvas/element/manual/drawing-images-to-the-canvas/image-orientation/drawImage-from-blob.tentative.html.ini
index 27a23a5b1125..8af6973c0740 100644
--- a/testing/web-platform/meta/html/canvas/element/manual/drawing-images-to-the-canvas/image-orientation/drawImage-from-blob.tentative.html.ini
+++ b/testing/web-platform/meta/html/canvas/element/manual/drawing-images-to-the-canvas/image-orientation/drawImage-from-blob.tentative.html.ini
@@ -2,6 +2,7 @@
   expected:
     if os == "win": PASS
     if (os == "linux") and nightly_build: PASS
+    if (os == "mac") and nightly_build: PASS
     if swgl: PASS
     FAIL
   fuzzy:
diff --git a/testing/web-platform/meta/html/canvas/offscreen/manual/draw-generic-family/2d.text.draw.generic.family.html.ini b/testing/web-platform/meta/html/canvas/offscreen/manual/draw-generic-family/2d.text.draw.generic.family.html.ini
new file mode 100644
index 000000000000..0159fd4d1154
--- /dev/null
+++ b/testing/web-platform/meta/html/canvas/offscreen/manual/draw-generic-family/2d.text.draw.generic.family.html.ini
@@ -0,0 +1,4 @@
+[2d.text.draw.generic.family.html]
+  [Test that drawing fantasy produces the same result between canvas and OffscreenCanvas]
+    expected:
+      if (os == "mac") and nightly_build: FAIL
diff --git a/testing/web-platform/meta/html/canvas/offscreen/manual/draw-generic-family/2d.text.draw.generic.family.w.html.ini b/testing/web-platform/meta/html/canvas/offscreen/manual/draw-generic-family/2d.text.draw.generic.family.w.html.ini
new file mode 100644
index 000000000000..48d367e9b1df
--- /dev/null
+++ b/testing/web-platform/meta/html/canvas/offscreen/manual/draw-generic-family/2d.text.draw.generic.family.w.html.ini
@@ -0,0 +1,11 @@
+[2d.text.draw.generic.family.w.html]
+  expected:
+    if (os == "mac") and nightly_build: ERROR
+
+  [Test that drawing serif produces the same result between canvas and OffscreenCanvas in a Worker]
+    expected:
+      if (os == "mac") and nightly_build: TIMEOUT
+
+  [Test that drawing fantasy produces the same result between canvas and OffscreenCanvas in a Worker]
+    expected:
+      if (os == "mac") and nightly_build: TIMEOUT
diff --git a/testing/web-platform/meta/html/rendering/non-replaced-elements/tables/table-background-print.html.ini b/testing/web-platform/meta/html/rendering/non-replaced-elements/tables/table-background-print.html.ini
index a977fc5d3bdc..a9d41ef5da9a 100644
--- a/testing/web-platform/meta/html/rendering/non-replaced-elements/tables/table-background-print.html.ini
+++ b/testing/web-platform/meta/html/rendering/non-replaced-elements/tables/table-background-print.html.ini
@@ -1,2 +1,2 @@
 [table-background-print.html]
-  fuzzy: maxDifference=0-133;totalPixels=0-321
+  fuzzy: maxDifference=0-138;totalPixels=0-647
diff --git a/testing/web-platform/meta/html/rendering/widgets/input-date-baseline-print.html.ini b/testing/web-platform/meta/html/rendering/widgets/input-date-baseline-print.html.ini
new file mode 100644
index 000000000000..c9f00f1ea768
--- /dev/null
+++ b/testing/web-platform/meta/html/rendering/widgets/input-date-baseline-print.html.ini
@@ -0,0 +1,3 @@
+[input-date-baseline-print.html]
+  fuzzy:
+    if os == "mac": maxDifference=0-1;totalPixels=0-1