diff --git a/patches/patchinstall.sh b/patches/patchinstall.sh
index 2cdc3de7..6f1e449f 100755
--- a/patches/patchinstall.sh
+++ b/patches/patchinstall.sh
@@ -257,6 +257,7 @@ patch_enable_all ()
 	enable_wined3d_zero_inf_shaders="$1"
 	enable_winedbg_Process_Arguments="$1"
 	enable_winedevice_Default_Drivers="$1"
+	enable_winemac_drv_no_flicker_patch="$1"
 	enable_winemapi_user_xdg_mail="$1"
 	enable_winemenubuilder_Desktop_Icon_Path="$1"
 	enable_winemenubuilder_integration="$1"
@@ -813,6 +814,9 @@ patch_enable ()
 		winedevice-Default_Drivers)
 			enable_winedevice_Default_Drivers="$2"
 			;;
+		winemac.drv-no-flicker-patch)
+			enable_winemac_drv_no_flicker_patch="$2"
+			;;
 		winemapi-user-xdg-mail)
 			enable_winemapi_user_xdg_mail="$2"
 			;;
@@ -3952,6 +3956,18 @@ if test "$enable_winedevice_Default_Drivers" -eq 1; then
 	patch_apply winedevice-Default_Drivers/0004-programs-winedevice-Load-some-common-drivers-and-fix.patch
 fi
 
+# Patchset winemac.drv-no-flicker-patch
+# |
+# | This patchset fixes the following Wine bugs:
+# |   *	[#34166] Fullscreen flickering on Mac
+# |
+# | Modified files:
+# |   *	dlls/winemac.drv/macdrv.h, dlls/winemac.drv/macdrv_main.c, dlls/winemac.drv/opengl.c
+# |
+if test "$enable_winemac_drv_no_flicker_patch" -eq 1; then
+	patch_apply winemac.drv-no-flicker-patch/0001-winemac.drv-No-Flicker-patch.patch
+fi
+
 # Patchset winemapi-user-xdg-mail
 # |
 # | This patchset fixes the following Wine bugs:
diff --git a/patches/winemac.drv-no-flicker-patch/0001-winemac.drv-No-Flicker-patch.patch b/patches/winemac.drv-no-flicker-patch/0001-winemac.drv-No-Flicker-patch.patch
new file mode 100644
index 00000000..66b93108
--- /dev/null
+++ b/patches/winemac.drv-no-flicker-patch/0001-winemac.drv-No-Flicker-patch.patch
@@ -0,0 +1,61 @@
+From b3cbf1c996a0a6f9533aa4461f77df08c123f74d Mon Sep 17 00:00:00 2001
+From: Ken Thomases <ken@codeweavers.com>
+Date: Tue, 22 Jun 2021 07:56:43 +1000
+Subject: [PATCH] winemac.drv: No Flicker patch
+
+---
+ dlls/winemac.drv/macdrv.h      | 1 +
+ dlls/winemac.drv/macdrv_main.c | 4 ++++
+ dlls/winemac.drv/opengl.c      | 2 +-
+ 3 files changed, 6 insertions(+), 1 deletion(-)
+
+diff --git a/dlls/winemac.drv/macdrv.h b/dlls/winemac.drv/macdrv.h
+index a7c0b4cac87..be119c50d48 100644
+--- a/dlls/winemac.drv/macdrv.h
++++ b/dlls/winemac.drv/macdrv.h
+@@ -41,6 +41,7 @@
+ extern BOOL allow_software_rendering DECLSPEC_HIDDEN;
+ extern BOOL disable_window_decorations DECLSPEC_HIDDEN;
+ extern HMODULE macdrv_module DECLSPEC_HIDDEN;
++extern BOOL force_backing_store DECLSPEC_HIDDEN;
+ 
+ 
+ extern const char* debugstr_cf(CFTypeRef t) DECLSPEC_HIDDEN;
+diff --git a/dlls/winemac.drv/macdrv_main.c b/dlls/winemac.drv/macdrv_main.c
+index 203e993ee93..2e5c1329a2a 100644
+--- a/dlls/winemac.drv/macdrv_main.c
++++ b/dlls/winemac.drv/macdrv_main.c
+@@ -63,6 +63,7 @@ int gl_surface_mode = GL_SURFACE_IN_FRONT_OPAQUE;
+ int retina_enabled = FALSE;
+ HMODULE macdrv_module = 0;
+ int enable_app_nap = FALSE;
++BOOL force_backing_store = FALSE;
+ 
+ CFDictionaryRef localized_strings;
+ 
+@@ -213,6 +214,9 @@ static void setup_options(void)
+     if (!get_config_key(hkey, appkey, "EnableAppNap", buffer, sizeof(buffer)))
+         enable_app_nap = IS_OPTION_TRUE(buffer[0]);
+ 
++    if (!get_config_key(hkey, appkey, "ForceOpenGLBackingStore", buffer, sizeof(buffer)))
++        force_backing_store = IS_OPTION_TRUE(buffer[0]);
++
+     /* Don't use appkey.  The DPI and monitor sizes should be consistent for all
+        processes in the prefix. */
+     if (!get_config_key(hkey, NULL, "RetinaMode", buffer, sizeof(buffer)))
+diff --git a/dlls/winemac.drv/opengl.c b/dlls/winemac.drv/opengl.c
+index 9f02e93d376..f3d4e2850e7 100644
+--- a/dlls/winemac.drv/opengl.c
++++ b/dlls/winemac.drv/opengl.c
+@@ -1477,7 +1477,7 @@ static BOOL create_context(struct wgl_context *context, CGLContextObj share, uns
+         attribs[n++] = pf->samples;
+     }
+ 
+-    if (pf->backing_store)
++    if (force_backing_store || pf->backing_store)
+         attribs[n++] = kCGLPFABackingStore;
+ 
+ #if defined(MAC_OS_X_VERSION_10_7) && MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_7
+-- 
+2.30.2
+
diff --git a/patches/winemac.drv-no-flicker-patch/definition b/patches/winemac.drv-no-flicker-patch/definition
new file mode 100644
index 00000000..07e4cb43
--- /dev/null
+++ b/patches/winemac.drv-no-flicker-patch/definition
@@ -0,0 +1 @@
+Fixes: [34166] Fullscreen flickering on Mac