diff --git a/extensions/markdown/package.json b/extensions/markdown/package.json
index 4ffa3bd6b39f6c5daacc7c756e041c543071c155..972deeb93ddc88653619486a0c193c28ab417521 100644
--- a/extensions/markdown/package.json
+++ b/extensions/markdown/package.json
@@ -143,7 +143,7 @@
 				},
 				"markdown.preview.fontFamily": {
 					"type": "string",
-					"default": "system-ui, 'Segoe WPC', 'Segoe UI', 'HelveticaNeue-Light', 'Ubuntu', 'Droid Sans', sans-serif",
+					"default": "-apple-system, BlinkMacSystemFont, 'Segoe WPC', 'Segoe UI', 'HelveticaNeue-Light', 'Ubuntu', 'Droid Sans', sans-serif",
 					"description": "%markdown.preview.fontFamily.desc%"
 				},
 				"markdown.preview.fontSize": {
diff --git a/src/vs/editor/browser/standalone/media/standalone-tokens.css b/src/vs/editor/browser/standalone/media/standalone-tokens.css
index 8c3ae996849a3afa6f6f71d95f1a0964cea24fd9..89184ea1f6670d627ed528e85f4ce5caaf1d429e 100644
--- a/src/vs/editor/browser/standalone/media/standalone-tokens.css
+++ b/src/vs/editor/browser/standalone/media/standalone-tokens.css
@@ -6,7 +6,7 @@
 
 /* Default standalone editor font */
 .monaco-editor {
-	font-family: system-ui, "Segoe WPC", "Segoe UI", "HelveticaNeue-Light", "Ubuntu", "Droid Sans", sans-serif;
+	font-family: -apple-system, BlinkMacSystemFont, "Segoe WPC", "Segoe UI", "HelveticaNeue-Light", "Ubuntu", "Droid Sans", sans-serif;
 }
 
 .monaco-menu .monaco-action-bar.vertical .action-item [tabindex="0"]:focus {
diff --git a/src/vs/workbench/electron-browser/media/shell.css b/src/vs/workbench/electron-browser/media/shell.css
index 5696fc87867aae8895c2f83dd2d18c94eae39526..f734da27292c903ab9acf2704057e388a2500b90 100644
--- a/src/vs/workbench/electron-browser/media/shell.css
+++ b/src/vs/workbench/electron-browser/media/shell.css
@@ -15,7 +15,7 @@
 
 /* Font Families (with CJK support) */
 
-.monaco-shell { font-family: system-ui, "Segoe WPC", "Segoe UI", "HelveticaNeue-Light", "Ubuntu", "Droid Sans", sans-serif; }
+.monaco-shell { font-family: -apple-system, BlinkMacSystemFont, "Segoe WPC", "Segoe UI", "HelveticaNeue-Light", "Ubuntu", "Droid Sans", sans-serif; }
 .monaco-shell:lang(zh-Hans) { font-family: -apple-system, BlinkMacSystemFont, "Segoe WPC", "Segoe UI", "HelveticaNeue-Light", "Noto Sans", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", "Source Han Sans CN", "Source Han Sans", sans-serif; }
 .monaco-shell:lang(zh-Hant) { font-family: -apple-system, BlinkMacSystemFont, "Segoe WPC", "Segoe UI", "HelveticaNeue-Light", "Noto Sans", "Microsoft Jhenghei", "PingFang TC", "Source Han Sans TC", "Source Han Sans", "Source Han Sans TW", sans-serif; }
 .monaco-shell:lang(ja) { font-family: -apple-system, BlinkMacSystemFont, "Segoe WPC", "Segoe UI", "HelveticaNeue-Light", "Noto Sans", "Meiryo", "Hiragino Kaku Gothic Pro", "Source Han Sans J", "Source Han Sans JP", "Source Han Sans", "Sazanami Gothic", "IPA Gothic", sans-serif; }
diff --git a/src/vs/workbench/parts/terminal/electron-browser/media/widgets.css b/src/vs/workbench/parts/terminal/electron-browser/media/widgets.css
index 2549ad7016355421281a373d2f8aaae611aa0aab..10751297b59543b35bf0dd3e1ca0a6959208e4b9 100644
--- a/src/vs/workbench/parts/terminal/electron-browser/media/widgets.css
+++ b/src/vs/workbench/parts/terminal/electron-browser/media/widgets.css
@@ -12,7 +12,7 @@
 }
 
 .monaco-workbench .terminal-message-widget {
-	font-family: system-ui, "Segoe WPC", "Segoe UI", "HelveticaNeue-Light", "Ubuntu", "Droid Sans", sans-serif;
+	font-family: -apple-system, BlinkMacSystemFont, "Segoe WPC", "Segoe UI", "HelveticaNeue-Light", "Ubuntu", "Droid Sans", sans-serif;
 	font-size: 14px;
 	line-height: 19px;
 	padding: 4px 5px;