diff --git a/macos/Ghostty.xcodeproj/project.pbxproj b/macos/Ghostty.xcodeproj/project.pbxproj
index d0942cad2..286fe5c87 100644
--- a/macos/Ghostty.xcodeproj/project.pbxproj
+++ b/macos/Ghostty.xcodeproj/project.pbxproj
@@ -69,6 +69,7 @@
 		C159E81D2B66A06B00FDFE9C /* OSColor+Extension.swift in Sources */ = {isa = PBXBuildFile; fileRef = C159E81C2B66A06B00FDFE9C /* OSColor+Extension.swift */; };
 		C159E89D2B69A2EF00FDFE9C /* OSColor+Extension.swift in Sources */ = {isa = PBXBuildFile; fileRef = C159E81C2B66A06B00FDFE9C /* OSColor+Extension.swift */; };
 		C1F26EA72B738B9900404083 /* NSView+Extension.swift in Sources */ = {isa = PBXBuildFile; fileRef = C1F26EA62B738B9900404083 /* NSView+Extension.swift */; };
+		C1F26EB22B743B7700404083 /* PlusDarkerBlendingModeLayer.m in Sources */ = {isa = PBXBuildFile; fileRef = C1F26EB12B743B7700404083 /* PlusDarkerBlendingModeLayer.m */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXFileReference section */
@@ -130,6 +131,9 @@
 		AEF9CE232B6AD07A0017E195 /* TerminalToolbar.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TerminalToolbar.swift; sourceTree = "<group>"; };
 		C159E81C2B66A06B00FDFE9C /* OSColor+Extension.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "OSColor+Extension.swift"; sourceTree = "<group>"; };
 		C1F26EA62B738B9900404083 /* NSView+Extension.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "NSView+Extension.swift"; sourceTree = "<group>"; };
+		C1F26EB02B743B7700404083 /* Ghostty-Bridging-Header.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = "Ghostty-Bridging-Header.h"; sourceTree = "<group>"; };
+		C1F26EB12B743B7700404083 /* PlusDarkerBlendingModeLayer.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = PlusDarkerBlendingModeLayer.m; sourceTree = "<group>"; };
+		C1F26EB32B743C9300404083 /* PlusDarkerBlendingModeLayer.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = PlusDarkerBlendingModeLayer.h; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -196,6 +200,8 @@
 				A59FB5D02AE0DEA7009128F3 /* MetalView.swift */,
 				C159E81C2B66A06B00FDFE9C /* OSColor+Extension.swift */,
 				C1F26EA62B738B9900404083 /* NSView+Extension.swift */,
+				C1F26EB32B743C9300404083 /* PlusDarkerBlendingModeLayer.h */,
+				C1F26EB12B743B7700404083 /* PlusDarkerBlendingModeLayer.m */,
 				A5CEAFDA29B8005900646FDA /* SplitView */,
 			);
 			path = Helpers;
@@ -235,6 +241,7 @@
 				A5FEB2FF2ABB69450068369E /* main.swift */,
 				A53426342A7DA53D00EBB7A2 /* AppDelegate.swift */,
 				857F63802A5E64F200CA4815 /* MainMenu.xib */,
+				C1F26EB02B743B7700404083 /* Ghostty-Bridging-Header.h */,
 			);
 			path = macOS;
 			sourceTree = "<group>";
@@ -406,6 +413,7 @@
 				TargetAttributes = {
 					A5B30530299BEAAA0047F10C = {
 						CreatedOnToolsVersion = 14.2;
+						LastSwiftMigration = 1510;
 					};
 					A5D4499C2B53AE7B000F5B83 = {
 						CreatedOnToolsVersion = 15.2;
@@ -496,6 +504,7 @@
 				A55685E029A03A9F004303CE /* AppError.swift in Sources */,
 				A535B9DA299C569B0017E2E4 /* ErrorView.swift in Sources */,
 				A51BFC202B2FB64F00E92F16 /* AboutController.swift in Sources */,
+				C1F26EB22B743B7700404083 /* PlusDarkerBlendingModeLayer.m in Sources */,
 				A5CEAFFF29C2410700646FDA /* Backport.swift in Sources */,
 				A5E112952AF73E8A00C6E0C2 /* ClipboardConfirmationController.swift in Sources */,
 				8503D7C72A549C66006CFF3D /* FullScreenHandler.swift in Sources */,
@@ -586,6 +595,7 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 				ASSETCATALOG_COMPILER_INCLUDE_ALL_APPICON_ASSETS = NO;
+				CLANG_ENABLE_MODULES = YES;
 				CODE_SIGN_ENTITLEMENTS = GhosttyReleaseLocal.entitlements;
 				"CODE_SIGN_IDENTITY[sdk=macosx*]" = "-";
 				CODE_SIGN_STYLE = Automatic;
@@ -612,6 +622,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.mitchellh.ghostty;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_EMIT_LOC_STRINGS = YES;
+				SWIFT_OBJC_BRIDGING_HEADER = "Sources/App/macOS/Ghostty-Bridging-Header.h";
 				SWIFT_VERSION = 5.0;
 			};
 			name = ReleaseLocal;
@@ -735,6 +746,7 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 				ASSETCATALOG_COMPILER_INCLUDE_ALL_APPICON_ASSETS = NO;
+				CLANG_ENABLE_MODULES = YES;
 				CODE_SIGN_ENTITLEMENTS = GhosttyDebug.entitlements;
 				"CODE_SIGN_IDENTITY[sdk=macosx*]" = "-";
 				CODE_SIGN_STYLE = Automatic;
@@ -760,6 +772,8 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.mitchellh.ghostty;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_EMIT_LOC_STRINGS = YES;
+				SWIFT_OBJC_BRIDGING_HEADER = "Sources/App/macOS/Ghostty-Bridging-Header.h";
+				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
 				SWIFT_VERSION = 5.0;
 			};
 			name = Debug;
@@ -770,6 +784,7 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 				ASSETCATALOG_COMPILER_INCLUDE_ALL_APPICON_ASSETS = NO;
+				CLANG_ENABLE_MODULES = YES;
 				CODE_SIGN_ENTITLEMENTS = Ghostty.entitlements;
 				"CODE_SIGN_IDENTITY[sdk=macosx*]" = "-";
 				CODE_SIGN_STYLE = Automatic;
@@ -796,6 +811,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.mitchellh.ghostty;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_EMIT_LOC_STRINGS = YES;
+				SWIFT_OBJC_BRIDGING_HEADER = "Sources/App/macOS/Ghostty-Bridging-Header.h";
 				SWIFT_VERSION = 5.0;
 			};
 			name = Release;
diff --git a/macos/Sources/App/macOS/Ghostty-Bridging-Header.h b/macos/Sources/App/macOS/Ghostty-Bridging-Header.h
new file mode 100644
index 000000000..44aaa3ff6
--- /dev/null
+++ b/macos/Sources/App/macOS/Ghostty-Bridging-Header.h
@@ -0,0 +1,5 @@
+//
+//  Use this file to import your target's public headers that you would like to expose to Swift.
+//
+
+#import "PlusDarkerBlendingModeLayer.h"
diff --git a/macos/Sources/Helpers/PlusDarkerBlendingModeLayer.h b/macos/Sources/Helpers/PlusDarkerBlendingModeLayer.h
new file mode 100644
index 000000000..e3d0c5f8e
--- /dev/null
+++ b/macos/Sources/Helpers/PlusDarkerBlendingModeLayer.h
@@ -0,0 +1,4 @@
+#import <QuartzCore/QuartzCore.h>
+
+@interface PlusDarkerBlendingModeLayer: CALayer
+@end
diff --git a/macos/Sources/Helpers/PlusDarkerBlendingModeLayer.m b/macos/Sources/Helpers/PlusDarkerBlendingModeLayer.m
new file mode 100644
index 000000000..2ec6933e5
--- /dev/null
+++ b/macos/Sources/Helpers/PlusDarkerBlendingModeLayer.m
@@ -0,0 +1,9 @@
+#import "PlusDarkerBlendingModeLayer.h"
+
+@implementation PlusDarkerBlendingModeLayer
+
+// A private compositing filter ("plus darker") that is used in titlebar
+// tab bars to create the effect of recessed, unselected tabs.
+- (id)compositingFilter { return @"plusD"; }
+
+@end