diff --git a/Package.swift b/Package.swift
index 7335123..96b1b04 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,9 +1,9 @@
-// swift-tools-version: 5.9
+// swift-tools-version: 5.10
 import PackageDescription
 
 let package = Package(
     name: "skip-bridge",
-    platforms: [.iOS(.v16), .macOS(.v13)],
+    platforms: [.iOS(.v16), .macOS(.v14)],
     products: [
         .library(name: "SkipBridge", type: .dynamic, targets: ["SkipBridge"]),
         .library(name: "SkipBridgeToKotlinSamples", type: .dynamic, targets: ["SkipBridgeToKotlinSamples"]),
diff --git a/Sources/SkipBridgeToKotlinCompatSamples/Samples.swift b/Sources/SkipBridgeToKotlinCompatSamples/Samples.swift
index 204454b..395707a 100644
--- a/Sources/SkipBridgeToKotlinCompatSamples/Samples.swift
+++ b/Sources/SkipBridgeToKotlinCompatSamples/Samples.swift
@@ -33,3 +33,67 @@ public class Compat {
 
 public struct CompatError: Error {
 }
+
+public struct CompatCallbacks: @unchecked Sendable {
+    // TODO: https://github.com/skiptools/skip/issues/534
+    //public typealias AsyncCallback = () async -> ()
+    public typealias AsyncCallback = () -> ()
+    public typealias Callback = () -> ()
+    public typealias URLCallback = (URL) -> ()
+
+    // `- error: invalid conversion from 'async' function of type '() async -> ()' to synchronous function type '() throws -> ()'
+    public let didLogin: AsyncCallback
+    public let didCancel: AsyncCallback
+    public let didSelectEmail: Callback
+    public let didSelectSettings: Callback
+    public let onURLSelected: URLCallback
+
+    public init(
+        didLogin: @escaping AsyncCallback = {},
+        didCancel: @escaping AsyncCallback = {},
+        didSelectEmail: @escaping Callback = {},
+        didSelectSettings: @escaping Callback = {},
+        onURLSelected: @escaping URLCallback = { _ in }
+    ) {
+        self.didLogin = didLogin
+        self.didCancel = didCancel
+        self.didSelectEmail = didSelectEmail
+        self.didSelectSettings = didSelectSettings
+        self.onURLSelected = onURLSelected
+    }
+}
+
+@MainActor
+open class CompatMainActor: Identifiable {
+    public nonisolated let id: String
+    public let scene: Int
+
+    public init(scene: Int, id: String? = nil) {
+        self.id = id ?? ""
+        self.scene = scene
+        setup()
+    }
+
+    public func setup() {
+    }
+}
+
+public struct CompatMutableStruct {
+    public var str: String
+    public init(_ str: String) {
+        self.str = str
+    }
+
+    public mutating func mutableFunc(_ str: String) {
+        self.str = str
+    }
+}
+
+//public enum CompatMutableEnum {
+//    case a
+//    case b(String)
+//
+//    public mutating func mutableFunc(_ update: String) {
+//        self = .b(update)
+//    }
+//}
diff --git a/Tests/SkipBridgeToKotlinCompatSamplesTests/BridgeToKotlinCompatSamplesTests.swift b/Tests/SkipBridgeToKotlinCompatSamplesTests/BridgeToKotlinCompatSamplesTests.swift
index 731a894..fda5902 100644
--- a/Tests/SkipBridgeToKotlinCompatSamplesTests/BridgeToKotlinCompatSamplesTests.swift
+++ b/Tests/SkipBridgeToKotlinCompatSamplesTests/BridgeToKotlinCompatSamplesTests.swift
@@ -92,4 +92,27 @@ final class BridgeToKotlinCompatTests: XCTestCase {
         XCTAssertEqual(collected2, listOf(100, 200))
         #endif
     }
+
+    func testCompatCallbacks() async {
+        #if SKIP
+        // TODO: make functions async to reproduce https://github.com/skiptools/skip/issues/534
+        let callbacks = CompatCallbacks(didLogin: { }, didCancel: { }, didSelectEmail: { }, didSelectSettings: { }, onURLSelected: { url in })
+        callbacks.didSelectEmail()
+        await callbacks.didLogin()
+        #endif
+    }
+
+    func testCompatMainActor() async {
+        #if SKIP
+        let compatMain = await CompatMainActor(scene: 123)
+        await compatMain.setup()
+        #endif
+    }
+
+    func testCompatMutableStruct() async {
+        #if SKIP
+        var compatStruct = CompatMutableStruct("ABC")
+        compatStruct.mutableFunc("XYZ")
+        #endif
+    }
 }