diff --git a/Mac/MainWindow/About/AboutHTML.swift b/Mac/MainWindow/About/AboutHTML.swift
index 1c5cd0433..f5317f55c 100644
--- a/Mac/MainWindow/About/AboutHTML.swift
+++ b/Mac/MainWindow/About/AboutHTML.swift
@@ -8,7 +8,6 @@
 
 import Html
 
-@available(macOS 12, *)
 struct AboutHTML: LoadableAboutData {
 
 	private func stylesheet() -> StaticString {
diff --git a/Mac/MainWindow/About/AboutNewNewsWireView.swift b/Mac/MainWindow/About/AboutNewNewsWireView.swift
index 30bcb9e18..97efaa071 100644
--- a/Mac/MainWindow/About/AboutNewNewsWireView.swift
+++ b/Mac/MainWindow/About/AboutNewNewsWireView.swift
@@ -10,7 +10,6 @@ import SwiftUI
 import WebKit
 import Html
  
-@available(macOS 12, *)
 fileprivate struct WebView: NSViewRepresentable {
 
 	var htmlString: String
@@ -50,7 +49,6 @@ fileprivate struct WebView: NSViewRepresentable {
 	}
 }
 
-@available(macOS 12, *)
 struct AboutNewNewsWireView: View, LoadableAboutData {
 	var body: some View {
 		VStack(spacing: 4) {
@@ -85,7 +83,7 @@ struct AboutNewNewsWireView: View, LoadableAboutData {
 	}
 }
 
-@available(macOS 12, *)
+
 struct AboutNetNewsWireView_Previews: PreviewProvider {
     static var previews: some View {
         AboutNewNewsWireView()
diff --git a/Mac/MainWindow/About/AboutWindowController.swift b/Mac/MainWindow/About/AboutWindowController.swift
index 341408dfd..52801fefd 100644
--- a/Mac/MainWindow/About/AboutWindowController.swift
+++ b/Mac/MainWindow/About/AboutWindowController.swift
@@ -16,7 +16,6 @@ extension NSUserInterfaceItemIdentifier {
 
 // MARK: - AboutWindowController
 
-@available(macOS 12, *)
 class AboutWindowController: NSWindowController {
 	
 	var hostingController: AboutHostingController
@@ -44,7 +43,6 @@ class AboutWindowController: NSWindowController {
 
 // MARK: - AboutHostingController
 
-@available(macOS 12, *)
 class AboutHostingController: NSHostingController<AnyView> {
 	
 	override init(rootView: AnyView) {
diff --git a/Mac/MainWindow/Detail/DetailWebView.swift b/Mac/MainWindow/Detail/DetailWebView.swift
index dd793dd23..974a3bafd 100644
--- a/Mac/MainWindow/Detail/DetailWebView.swift
+++ b/Mac/MainWindow/Detail/DetailWebView.swift
@@ -53,51 +53,10 @@ import RSCore
 	override func viewDidEndLiveResize() {
 		super.viewDidEndLiveResize()
 		evaluateJavaScript("document.body.style.overflow = 'visible';", completionHandler: nil)
-		bigSurOffsetFix()
 	}
 	
 	override func setFrameSize(_ newSize: NSSize) {
 		super.setFrameSize(newSize)
-		if (!inLiveResize) {
-			bigSurOffsetFix()
-		}
-	}
-		
-	private var inBigSurOffsetFix = false
-	
-	@available(macOS, obsoleted: 12, message: "when minimum deployment > macOS 11 remove bigSurOffsetFix() and calls to it.")
-	private func bigSurOffsetFix() {
-		/*
-		On macOS 11, when a user exits full screen
-		or exits zoomed mode by disconnecting an external display
-		the webview's `origin.y` is offset by a sizeable amount.
-		
-		This code adjusts the height of the window by -1pt/+1pt,
-		which puts the webview back in the correct place.
-		 
-		This code is only executed if currently running on macOS 11
-		*/
-		
-		if #unavailable(macOS 12) {
-			guard var frame = window?.frame else {
-				return
-			}
-			
-			guard !inBigSurOffsetFix else {
-				return
-			}
-			
-			inBigSurOffsetFix = true
-			
-			defer {
-				inBigSurOffsetFix = false
-			}
-			
-			frame.size = NSSize(width: window!.frame.width, height: window!.frame.height - 1)
-			window!.setFrame(frame, display: false)
-			frame.size = NSSize(width: frame.width, height: frame.height + 1)
-			window!.setFrame(frame, display: false)
-		}
 	}
 
 	// MARK: NSTextFinderClient
diff --git a/Shared/AboutData.swift b/Shared/AboutData.swift
index 4e76aa141..03e0cc95a 100644
--- a/Shared/AboutData.swift
+++ b/Shared/AboutData.swift
@@ -9,13 +9,11 @@
 import Foundation
 
 @available(iOS 15, *)
-@available(macOS 12, *)
 protocol LoadableAboutData {
 	var about: AboutData { get }
 }
 
 @available(iOS 15, *)
-@available(macOS 12, *)
 extension LoadableAboutData {
 	
 	var about: AboutData {
@@ -30,7 +28,6 @@ extension LoadableAboutData {
 }
 
 @available(iOS 15, *)
-@available(macOS 12, *)
 struct AboutData: Codable {
 	var PrimaryContributors: [Contributor]
 	var AdditionalContributors: [Contributor]
diff --git a/xcconfig/NetNewsWire_project.xcconfig b/xcconfig/NetNewsWire_project.xcconfig
index 40588ba58..e838801a9 100644
--- a/xcconfig/NetNewsWire_project.xcconfig
+++ b/xcconfig/NetNewsWire_project.xcconfig
@@ -40,7 +40,7 @@ GCC_WARN_UNDECLARED_SELECTOR = YES
 GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE
 GCC_WARN_UNUSED_FUNCTION = YES
 GCC_WARN_UNUSED_VARIABLE = YES
-MACOSX_DEPLOYMENT_TARGET = 11.0
+MACOSX_DEPLOYMENT_TARGET = 13.0
 IPHONEOS_DEPLOYMENT_TARGET = 15.0
 //SDKROOT = macosx
 SWIFT_SWIFT3_OBJC_INFERENCE = Off
diff --git a/xcconfig/common/NetNewsWire_mac_target_common.xcconfig b/xcconfig/common/NetNewsWire_mac_target_common.xcconfig
index 94e967287..bf6df1e67 100644
--- a/xcconfig/common/NetNewsWire_mac_target_common.xcconfig
+++ b/xcconfig/common/NetNewsWire_mac_target_common.xcconfig
@@ -6,5 +6,5 @@ ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = NO
 ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon
 COMBINE_HIDPI_IMAGES = YES
-MACOSX_DEPLOYMENT_TARGET = 11.0
+MACOSX_DEPLOYMENT_TARGET = 13.0
 SDKROOT = macosx;