diff --git a/atom/browser/api/atom_api_system_preferences_mac.mm b/atom/browser/api/atom_api_system_preferences_mac.mm
index bbc336eeacb1c..2d6ec1cc4a994 100644
--- a/atom/browser/api/atom_api_system_preferences_mac.mm
+++ b/atom/browser/api/atom_api_system_preferences_mac.mm
@@ -557,7 +557,7 @@ AVMediaType ParseMediaType(const std::string& media_type) {
 }
 
 bool SystemPreferences::IsDarkMode() {
-  if (@available(macOS 10.14, *)) {
+  if (@available(macOS 10.15, *)) {
     return [[NSApplication sharedApplication].effectiveAppearance.name
         isEqualToString:NSAppearanceNameDarkAqua];
   }
diff --git a/atom/browser/ui/tray_icon_cocoa.mm b/atom/browser/ui/tray_icon_cocoa.mm
index bbcae719bf365..d1d35307a9f7a 100644
--- a/atom/browser/ui/tray_icon_cocoa.mm
+++ b/atom/browser/ui/tray_icon_cocoa.mm
@@ -149,7 +149,7 @@ - (void)drawRect:(NSRect)dirtyRect {
 }
 
 - (BOOL)isDarkMode {
-  if (@available(macOS 10.14, *)) {
+  if (@available(macOS 10.15, *)) {
     return [[NSApplication sharedApplication].effectiveAppearance.name
         isEqualToString:NSAppearanceNameDarkAqua];
   }