diff --git a/.github/workflows/containerization-build-template.yml b/.github/workflows/containerization-build-template.yml
index 0636a7a1..b57f85d8 100644
--- a/.github/workflows/containerization-build-template.yml
+++ b/.github/workflows/containerization-build-template.yml
@@ -22,7 +22,6 @@ jobs:
       contents: read
       packages: write
     env:
-      CURRENT_SDK: y
       DEVELOPER_DIR: "/Applications/Xcode_26.b1.app/Contents/Developer"
 
     steps:
diff --git a/Package.swift b/Package.swift
index db7f5237..0651bcaf 100644
--- a/Package.swift
+++ b/Package.swift
@@ -21,14 +21,6 @@ import CompilerPluginSupport
 import Foundation
 import PackageDescription
 
-let settings: [SwiftSetting]
-if ProcessInfo.processInfo.environment["CURRENT_SDK"] != nil {
-    // TODO: Remove this compile condition when the updated macOS SDK is available publicly
-    settings = [.define("CURRENT_SDK")]
-} else {
-    settings = []
-}
-
 let package = Package(
     name: "containerization",
     platforms: [.macOS("15")],
@@ -77,8 +69,7 @@ let package = Package(
             ],
             exclude: [
                 "../Containerization/SandboxContext/SandboxContext.proto"
-            ],
-            swiftSettings: settings
+            ]
         ),
         .executableTarget(
             name: "cctl",
diff --git a/Sources/Containerization/NATNetworkInterface.swift b/Sources/Containerization/NATNetworkInterface.swift
index d5dbdac9..ed5e833c 100644
--- a/Sources/Containerization/NATNetworkInterface.swift
+++ b/Sources/Containerization/NATNetworkInterface.swift
@@ -20,45 +20,44 @@ import vmnet
 import Virtualization
 import ContainerizationError
 import Foundation
-import Synchronization
+import SendableProperty
 
 /// An interface that uses NAT to provide an IP address for a given
 /// container/virtual machine.
 @available(macOS 26, *)
 public final class NATNetworkInterface: Interface, Sendable {
     public var address: String {
-        get { state.withLock { $0.address } }
-        set { state.withLock { $0.address = newValue } }
+        get { state.address }
+        set { state.address = newValue }
 
     }
 
     public var gateway: String {
-        get { state.withLock { $0.gateway } }
-        set { state.withLock { $0.gateway = newValue } }
+        get { state.gateway }
+        set { state.gateway = newValue }
+    }
+
+    @available(macOS 26, *)
+    public var reference: vmnet_network_ref {
+        state.reference
     }
 
     public var macAddress: String? {
-        get { state.withLock { $0.macAddress } }
-        set { state.withLock { $0.macAddress = newValue } }
+        get { state.macAddress }
+        set { state.macAddress = newValue }
     }
 
-    struct State {
-        var address: String
-        var gateway: String
-        var macAddress: String?
-        #if !CURRENT_SDK
-        var reference: vmnet_network_ref
-        #endif
+    private struct State {
+        fileprivate var address: String
+        fileprivate var gateway: String
+        fileprivate var reference: vmnet_network_ref!
+        fileprivate var macAddress: String?
     }
 
-    #if !CURRENT_SDK
-    public var reference: vmnet_network_ref {
-        state.withLock { $0.reference }
-    }
-    #endif
+    @SendableProperty
+    private var state: State
 
-    private let state: Mutex<State>
-    #if !CURRENT_SDK
+    @available(macOS 26, *)
     public init(
         address: String,
         gateway: String,
@@ -66,29 +65,26 @@ public final class NATNetworkInterface: Interface, Sendable {
         macAddress: String? = nil
     ) {
         self.state = .init(
-            .init(
-                address: address,
-                gateway: gateway,
-                macAddress: macAddress,
-                reference: reference
-            )
+            address: address,
+            gateway: gateway,
+            reference: reference,
+            macAddress: macAddress
         )
     }
-    #else
+
+    @available(macOS, obsoleted: 26, message: "Use init(address:gateway:reference:macAddress:) instead")
     public init(
         address: String,
         gateway: String,
         macAddress: String? = nil
     ) {
         self.state = .init(
-            .init(
-                address: address,
-                gateway: gateway,
-                macAddress: macAddress
-            )
+            address: address,
+            gateway: gateway,
+            reference: nil,
+            macAddress: macAddress
         )
     }
-    #endif
 }
 
 @available(macOS 26, *)
@@ -102,11 +98,7 @@ extension NATNetworkInterface: VZInterface {
             config.macAddress = mac
         }
 
-        #if !CURRENT_SDK
         config.attachment = VZVmnetNetworkDeviceAttachment(network: self.reference)
-        #else
-        config.attachment = VZNATNetworkDeviceAttachment()
-        #endif
         return config
     }
 }
diff --git a/scripts/make-docs.sh b/scripts/make-docs.sh
index 08542587..406b896c 100755
--- a/scripts/make-docs.sh
+++ b/scripts/make-docs.sh
@@ -14,9 +14,6 @@
 # limitations under the License.
 
 opts=()
-if [ ! -z "${CURRENT_SDK}" ] ; then
-    opts+=("-Xswiftc" "-DCURRENT_SDK")
-fi
 opts+=("--allow-writing-to-directory" "$1")
 opts+=("generate-documentation")
 opts+=("--target" "Containerization")