diff --git a/Sources/GeneratorCLI/GeneratorCLI.swift b/Sources/GeneratorCLI/GeneratorCLI.swift
index d1a5432..e75f2ed 100644
--- a/Sources/GeneratorCLI/GeneratorCLI.swift
+++ b/Sources/GeneratorCLI/GeneratorCLI.swift
@@ -141,12 +141,13 @@ extension GeneratorCLI {
     var targetSwiftPackagePath: String? = nil
 
     @Option(
+      name: .customLong("host"),
       help: """
-        The host triple of the bundle. Defaults to a triple of the machine this generator is \
-        running on if unspecified.
+        The host triples of the bundle. Defaults to a triple or triples of the machine this generator is \
+        running on if unspecified. Multiple host triples are only supported for macOS hosts.
         """
     )
-    var host: Triple? = nil
+    var hosts: [Triple] = []
 
     @Option(
       help:
@@ -174,9 +175,9 @@ extension GeneratorCLI {
       #endif
     }
 
-    func deriveHostTriple() throws -> Triple {
-      if let host {
-        return host
+    func deriveHostTriples() throws -> [Triple] {
+      if !hosts.isEmpty {
+        return hosts
       }
       let current = try SwiftSDKGenerator.getCurrentTriple(isVerbose: self.verbose)
       if let arch = hostArch {
@@ -184,9 +185,16 @@ extension GeneratorCLI {
         appLogger.warning(
           "deprecated: Please use `--host \(target.triple)` instead of `--host-arch \(arch)`"
         )
-        return target
+        return [target]
+      }
+      // macOS toolchains are built as universal binaries
+      if current.isMacOSX {
+        return [
+          Triple("arm64-apple-macos"),
+          Triple("x86_64-apple-macos"),
+        ]
       }
-      return current
+      return [current]
     }
   }
 
@@ -230,7 +238,7 @@ extension GeneratorCLI {
     )
     var distributionVersion: String?
 
-    func deriveTargetTriple(hostTriple: Triple) -> Triple {
+    func deriveTargetTriple(hostTriples: [Triple]) -> Triple {
       if let target = generatorOptions.target {
         return target
       }
@@ -241,7 +249,13 @@ extension GeneratorCLI {
         )
         return target
       }
-      return Triple(arch: hostTriple.arch!, vendor: nil, os: .linux, environment: .gnu)
+      let arch: Triple.Arch
+      if hostTriples.count == 1, let hostTriple = hostTriples.first {
+        arch = hostTriple.arch!
+      } else {
+        arch = try! SwiftSDKGenerator.getCurrentTriple(isVerbose: false).arch!
+      }
+      return Triple(arch: arch, vendor: nil, os: .linux, environment: .gnu)
     }
 
     func run() async throws {
@@ -265,12 +279,12 @@ extension GeneratorCLI {
         name: distributionName,
         version: distributionVersion
       )
-      let hostTriple = try self.generatorOptions.deriveHostTriple()
-      let targetTriple = self.deriveTargetTriple(hostTriple: hostTriple)
+      let hostTriples = try self.generatorOptions.deriveHostTriples()
+      let targetTriple = self.deriveTargetTriple(hostTriples: hostTriples)
 
       let recipe = try LinuxRecipe(
         targetTriple: targetTriple,
-        hostTriple: hostTriple,
+        hostTriples: hostTriples,
         linuxDistribution: linuxDistribution,
         swiftVersion: generatorOptions.swiftVersion,
         swiftBranch: self.generatorOptions.swiftBranch,
@@ -333,8 +347,8 @@ extension GeneratorCLI {
       }
       let recipe = try WebAssemblyRecipe(
         hostSwiftPackage: generatorOptions.hostSwiftPackagePath.map {
-          let hostTriple = try self.generatorOptions.deriveHostTriple()
-          return WebAssemblyRecipe.HostToolchainPackage(path: FilePath($0), triple: hostTriple)
+          let hostTriples = try self.generatorOptions.deriveHostTriples()
+          return WebAssemblyRecipe.HostToolchainPackage(path: FilePath($0), triples: hostTriples)
         },
         targetSwiftPackagePath: FilePath(targetSwiftPackagePath),
         wasiSysroot: FilePath(self.wasiSysroot),
diff --git a/Sources/SwiftSDKGenerator/Artifacts/DownloadableArtifacts.swift b/Sources/SwiftSDKGenerator/Artifacts/DownloadableArtifacts.swift
index 1af7fd1..d5725ac 100644
--- a/Sources/SwiftSDKGenerator/Artifacts/DownloadableArtifacts.swift
+++ b/Sources/SwiftSDKGenerator/Artifacts/DownloadableArtifacts.swift
@@ -44,7 +44,7 @@ struct DownloadableArtifacts: Sendable {
   private let paths: PathsConfiguration
 
   init(
-    hostTriple: Triple,
+    hostTriples: [Triple],
     targetTriple: Triple,
     _ versions: VersionsConfiguration,
     _ paths: PathsConfiguration
@@ -52,7 +52,22 @@ struct DownloadableArtifacts: Sendable {
     self.versions = versions
     self.paths = paths
 
-    if hostTriple.os == .linux {
+    guard let hostTriple = hostTriples.first else {
+      throw StringError("no host triples")
+    }
+
+    if hostTriples.allSatisfy({ $0.os == .macosx }) {
+      self.hostSwift = .init(
+        remoteURL: versions.swiftDownloadURL(
+          subdirectory: "xcode",
+          platform: "osx",
+          fileExtension: "pkg"
+        ),
+        localPath: paths.artifactsCachePath
+          .appending("host_swift_\(versions.swiftVersion)_apple-macos.pkg"),
+        isPrebuilt: true
+      )
+    } else if hostTriple.os == .linux {
       // Amazon Linux 2 is chosen for its best compatibility with all Swift-supported Linux hosts
       let hostArchSuffix =
         hostTriple.arch == .aarch64 ? "-\(Triple.Arch.aarch64.linuxConventionName)" : ""
@@ -67,16 +82,13 @@ struct DownloadableArtifacts: Sendable {
         isPrebuilt: true
       )
     } else {
-      self.hostSwift = .init(
-        remoteURL: versions.swiftDownloadURL(
-          subdirectory: "xcode",
-          platform: "osx",
-          fileExtension: "pkg"
-        ),
-        localPath: paths.artifactsCachePath
-          .appending("host_swift_\(versions.swiftVersion)_\(hostTriple.triple).pkg"),
-        isPrebuilt: true
-      )
+      if hostTriples.count > 1 {
+        throw StringError(
+          "unsupported host triples \(hostTriples.map { "\($0)" }.joined(separator: ", ")) (only macOS supports multiple host triples)"
+        )
+      } else {
+        throw StringError("unsupported host triple \(hostTriple)")
+      }
     }
 
     self.hostLLVM = .init(
@@ -121,3 +133,10 @@ struct DownloadableArtifacts: Sendable {
     )
   }
 }
+
+struct StringError: Error, CustomStringConvertible {
+  let description: String
+  init(_ description: String) {
+    self.description = description
+  }
+}
diff --git a/Sources/SwiftSDKGenerator/SwiftSDKRecipes/LinuxRecipe.swift b/Sources/SwiftSDKGenerator/SwiftSDKRecipes/LinuxRecipe.swift
index af3ecc4..3849bdf 100644
--- a/Sources/SwiftSDKGenerator/SwiftSDKRecipes/LinuxRecipe.swift
+++ b/Sources/SwiftSDKGenerator/SwiftSDKRecipes/LinuxRecipe.swift
@@ -30,7 +30,7 @@ package struct LinuxRecipe: SwiftSDKRecipe {
   }
 
   let mainTargetTriple: Triple
-  let mainHostTriple: Triple
+  let mainHostTriples: [Triple]
   let linuxDistribution: LinuxDistribution
   let targetSwiftSource: TargetSwiftSource
   let hostSwiftSource: HostSwiftSource
@@ -46,7 +46,7 @@ package struct LinuxRecipe: SwiftSDKRecipe {
 
   package init(
     targetTriple: Triple,
-    hostTriple: Triple,
+    hostTriples: [Triple],
     linuxDistribution: LinuxDistribution,
     swiftVersion: String,
     swiftBranch: String?,
@@ -89,7 +89,7 @@ package struct LinuxRecipe: SwiftSDKRecipe {
 
     self.init(
       mainTargetTriple: targetTriple,
-      mainHostTriple: hostTriple,
+      mainHostTriples: hostTriples,
       linuxDistribution: linuxDistribution,
       targetSwiftSource: targetSwiftSource,
       hostSwiftSource: hostSwiftSource,
@@ -100,7 +100,7 @@ package struct LinuxRecipe: SwiftSDKRecipe {
 
   package init(
     mainTargetTriple: Triple,
-    mainHostTriple: Triple,
+    mainHostTriples: [Triple],
     linuxDistribution: LinuxDistribution,
     targetSwiftSource: TargetSwiftSource,
     hostSwiftSource: HostSwiftSource,
@@ -108,7 +108,7 @@ package struct LinuxRecipe: SwiftSDKRecipe {
     logger: Logger
   ) {
     self.mainTargetTriple = mainTargetTriple
-    self.mainHostTriple = mainHostTriple
+    self.mainHostTriples = mainHostTriples
     self.linuxDistribution = linuxDistribution
     self.targetSwiftSource = targetSwiftSource
     self.hostSwiftSource = hostSwiftSource
@@ -180,7 +180,7 @@ package struct LinuxRecipe: SwiftSDKRecipe {
   func itemsToDownload(from artifacts: DownloadableArtifacts) -> [DownloadableArtifacts.Item] {
     var items: [DownloadableArtifacts.Item] = []
     if self.hostSwiftSource != .preinstalled
-      && self.mainHostTriple.os != .linux
+      && !self.mainHostTriples.contains(where: { $0.os == .linux })
       && !self.versionsConfiguration.swiftVersion.hasPrefix("6.")
     {
       items.append(artifacts.hostLLVM)
@@ -218,7 +218,7 @@ package struct LinuxRecipe: SwiftSDKRecipe {
       return nil
     }
 
-    return [self.mainHostTriple]
+    return self.mainHostTriples
   }
 
   package func makeSwiftSDK(
@@ -240,7 +240,7 @@ package struct LinuxRecipe: SwiftSDKRecipe {
     try await generator.createDirectoryIfNeeded(at: sdkDirPath)
 
     var downloadableArtifacts = try DownloadableArtifacts(
-      hostTriple: mainHostTriple,
+      hostTriples: mainHostTriples,
       targetTriple: generator.targetTriple,
       self.versionsConfiguration,
       generator.pathsConfiguration
@@ -335,7 +335,7 @@ package struct LinuxRecipe: SwiftSDKRecipe {
     }
 
     if self.hostSwiftSource != .preinstalled {
-      if self.mainHostTriple.os != .linux
+      if !self.mainHostTriples.contains(where: { $0.os == .linux })
         && !self.versionsConfiguration.swiftVersion.hasPrefix("6.")
       {
         try await generator.prepareLLDLinker(engine, llvmArtifact: downloadableArtifacts.hostLLVM)
diff --git a/Sources/SwiftSDKGenerator/SwiftSDKRecipes/WebAssemblyRecipe.swift b/Sources/SwiftSDKGenerator/SwiftSDKRecipes/WebAssemblyRecipe.swift
index 0e3d956..84996a6 100644
--- a/Sources/SwiftSDKGenerator/SwiftSDKRecipes/WebAssemblyRecipe.swift
+++ b/Sources/SwiftSDKGenerator/SwiftSDKRecipes/WebAssemblyRecipe.swift
@@ -24,11 +24,11 @@ package struct WebAssemblyRecipe: SwiftSDKRecipe {
 
   package struct HostToolchainPackage: Sendable {
     let path: FilePath
-    let triple: Triple
+    let triples: [Triple]
 
-    package init(path: FilePath, triple: Triple) {
+    package init(path: FilePath, triples: [Triple]) {
       self.path = path
-      self.triple = triple
+      self.triples = triples
     }
   }
 
@@ -145,7 +145,7 @@ package struct WebAssemblyRecipe: SwiftSDKRecipe {
     logger.info("Copying Swift binaries for the host triple...")
     var hostTriples: [Triple]? = nil
     if let hostSwiftPackage {
-      hostTriples = [hostSwiftPackage.triple]
+      hostTriples = hostSwiftPackage.triples
       try await generator.rsync(
         from: hostSwiftPackage.path.appending("usr"),
         to: pathsConfiguration.toolchainDirPath
diff --git a/Tests/SwiftSDKGeneratorTests/ArchitectureMappingTests.swift b/Tests/SwiftSDKGeneratorTests/ArchitectureMappingTests.swift
index 893d8c7..ba76c11 100644
--- a/Tests/SwiftSDKGeneratorTests/ArchitectureMappingTests.swift
+++ b/Tests/SwiftSDKGeneratorTests/ArchitectureMappingTests.swift
@@ -49,7 +49,7 @@ final class ArchitectureMappingTests: XCTestCase {
   ) async throws {
     let recipe = try LinuxRecipe(
       targetTriple: targetTriple,
-      hostTriple: hostTriple,
+      hostTriples: [hostTriple],
       linuxDistribution: .ubuntu(.jammy),
       swiftVersion: "5.8-RELEASE",
       swiftBranch: nil,
@@ -79,7 +79,7 @@ final class ArchitectureMappingTests: XCTestCase {
 
     // Verify download URLs
     let artifacts = try await DownloadableArtifacts(
-      hostTriple: hostTriple,
+      hostTriples: [hostTriple],
       targetTriple: sdk.targetTriple,
       recipe.versionsConfiguration,
       sdk.pathsConfiguration
diff --git a/Tests/SwiftSDKGeneratorTests/SwiftSDKRecipes/LinuxRecipeTests.swift b/Tests/SwiftSDKGeneratorTests/SwiftSDKRecipes/LinuxRecipeTests.swift
index b57807e..b948099 100644
--- a/Tests/SwiftSDKGeneratorTests/SwiftSDKRecipes/LinuxRecipeTests.swift
+++ b/Tests/SwiftSDKGeneratorTests/SwiftSDKRecipes/LinuxRecipeTests.swift
@@ -19,7 +19,7 @@ final class LinuxRecipeTests: XCTestCase {
   let logger = Logger(label: "LinuxRecipeTests")
 
   func createRecipe(
-    hostTriple: Triple = Triple("x86_64-unknown-linux-gnu"),
+    hostTriples: [Triple] = [Triple("x86_64-unknown-linux-gnu")],
     linuxDistribution: LinuxDistribution,
     swiftVersion: String = "6.0",
     withDocker: Bool = false,
@@ -30,7 +30,7 @@ final class LinuxRecipeTests: XCTestCase {
   ) throws -> LinuxRecipe {
     try LinuxRecipe(
       targetTriple: Triple("aarch64-unknown-linux-gnu"),
-      hostTriple: hostTriple,
+      hostTriples: hostTriples,
       linuxDistribution: linuxDistribution,
       swiftVersion: swiftVersion,
       swiftBranch: nil,
@@ -132,7 +132,7 @@ final class LinuxRecipeTests: XCTestCase {
       targetTriple: recipe.mainTargetTriple
     )
     let downloadableArtifacts = try DownloadableArtifacts(
-      hostTriple: recipe.mainHostTriple,
+      hostTriples: recipe.mainHostTriples,
       targetTriple: recipe.mainTargetTriple,
       recipe.versionsConfiguration,
       pathsConfiguration
@@ -154,8 +154,19 @@ final class LinuxRecipeTests: XCTestCase {
     XCTAssertEqual(foundHostSwift, includesHostSwift)
   }
 
-  func testItemsToDownloadForMacOSHost() throws {
-    let hostTriple = Triple("x86_64-apple-macos")
+  func testItemsToDownloadForMacOSHost_arm64() throws {
+    try _testItemsToDownloadForMacOSHost(hostTriples: [Triple("arm64-apple-macos")])
+  }
+
+  func testItemsToDownloadForMacOSHost_x86_64() throws {
+    try _testItemsToDownloadForMacOSHost(hostTriples: [Triple("x86_64-apple-macos")])
+  }
+
+  func testItemsToDownloadForMacOSHost_multiArch() throws {
+    try _testItemsToDownloadForMacOSHost(hostTriples: [Triple("arm64-apple-macos"), Triple("x86_64-apple-macos")])
+  }
+
+  func _testItemsToDownloadForMacOSHost(hostTriples: [Triple]) throws {
     let linuxDistribution = try LinuxDistribution(name: .ubuntu, version: "22.04")
     let testCases:
       [(
@@ -165,7 +176,7 @@ final class LinuxRecipeTests: XCTestCase {
         (
           // Remote tarballs on Swift < 6.0
           recipe: try createRecipe(
-            hostTriple: hostTriple,
+            hostTriples: hostTriples,
             linuxDistribution: linuxDistribution,
             swiftVersion: "5.10"
           ),
@@ -176,7 +187,7 @@ final class LinuxRecipeTests: XCTestCase {
         (
           // Remote tarballs on Swift >= 6.0
           recipe: try createRecipe(
-            hostTriple: hostTriple,
+            hostTriples: hostTriples,
             linuxDistribution: linuxDistribution,
             swiftVersion: "6.0"
           ),
@@ -187,7 +198,7 @@ final class LinuxRecipeTests: XCTestCase {
         (
           // Remote target tarball with preinstalled toolchain
           recipe: try createRecipe(
-            hostTriple: hostTriple,
+            hostTriples: hostTriples,
             linuxDistribution: linuxDistribution,
             swiftVersion: "5.9",
             includeHostToolchain: false
@@ -199,7 +210,7 @@ final class LinuxRecipeTests: XCTestCase {
         (
           // Local packages with Swift < 6.0
           recipe: try createRecipe(
-            hostTriple: hostTriple,
+            hostTriples: hostTriples,
             linuxDistribution: linuxDistribution,
             swiftVersion: "5.10",
             hostSwiftPackagePath: "/path/to/host/swift",
@@ -212,7 +223,7 @@ final class LinuxRecipeTests: XCTestCase {
         (
           // Local packages with Swift >= 6.0
           recipe: try createRecipe(
-            hostTriple: hostTriple,
+            hostTriples: hostTriples,
             linuxDistribution: linuxDistribution,
             swiftVersion: "6.0",
             hostSwiftPackagePath: "/path/to/host/swift",
@@ -235,13 +246,13 @@ final class LinuxRecipeTests: XCTestCase {
   }
 
   func testItemsToDownloadForLinuxHost() throws {
-    let hostTriple = Triple("x86_64-unknown-linux-gnu")
+    let hostTriples = [Triple("x86_64-unknown-linux-gnu")]
     let linuxDistribution = try LinuxDistribution(name: .ubuntu, version: "22.04")
     let testCases = [
       (
         // Remote tarballs on Swift < 6.0
         recipe: try createRecipe(
-          hostTriple: hostTriple,
+          hostTriples: hostTriples,
           linuxDistribution: linuxDistribution,
           swiftVersion: "5.10"
         ),
@@ -251,7 +262,7 @@ final class LinuxRecipeTests: XCTestCase {
       (
         // Remote tarballs on Swift >= 6.0
         recipe: try createRecipe(
-          hostTriple: hostTriple,
+          hostTriples: hostTriples,
           linuxDistribution: linuxDistribution,
           swiftVersion: "6.0"
         ),
@@ -261,7 +272,7 @@ final class LinuxRecipeTests: XCTestCase {
       (
         // Remote target tarball with preinstalled toolchain
         recipe: try createRecipe(
-          hostTriple: hostTriple,
+          hostTriples: hostTriples,
           linuxDistribution: linuxDistribution,
           swiftVersion: "5.9",
           includeHostToolchain: false
@@ -272,7 +283,7 @@ final class LinuxRecipeTests: XCTestCase {
       (
         // Local packages with Swift < 6.0
         recipe: try createRecipe(
-          hostTriple: hostTriple,
+          hostTriples: hostTriples,
           linuxDistribution: linuxDistribution,
           swiftVersion: "5.10",
           hostSwiftPackagePath: "/path/to/host/swift",
@@ -284,7 +295,7 @@ final class LinuxRecipeTests: XCTestCase {
       (
         // Local packages with Swift >= 6.0
         recipe: try createRecipe(
-          hostTriple: hostTriple,
+          hostTriples: hostTriples,
           linuxDistribution: linuxDistribution,
           swiftVersion: "6.0",
           hostSwiftPackagePath: "/path/to/host/swift",
@@ -307,12 +318,12 @@ final class LinuxRecipeTests: XCTestCase {
 
   // Ubuntu toolchains will be selected for Debian 11 and 12 depending on the Swift version
   func testItemsToDownloadForDebianTargets() throws {
-    let hostTriple = Triple("x86_64-unknown-linux-gnu")
+    let hostTriples = [Triple("x86_64-unknown-linux-gnu")]
     let testCases = [
       (
         // Debian 11 -> ubuntu20.04
         recipe: try createRecipe(
-          hostTriple: hostTriple,
+          hostTriples: hostTriples,
           linuxDistribution: try LinuxDistribution(name: .debian, version: "11"),
           swiftVersion: "5.9"
         ),
@@ -321,7 +332,7 @@ final class LinuxRecipeTests: XCTestCase {
       (
         // Debian 12 with Swift 5.9 -> ubuntu22.04
         recipe: try createRecipe(
-          hostTriple: hostTriple,
+          hostTriples: hostTriples,
           linuxDistribution: try LinuxDistribution(name: .debian, version: "12"),
           swiftVersion: "5.9"
         ),
@@ -330,7 +341,7 @@ final class LinuxRecipeTests: XCTestCase {
       (
         // Debian 12 with Swift 5.10 -> ubuntu22.04
         recipe: try createRecipe(
-          hostTriple: hostTriple,
+          hostTriples: hostTriples,
           linuxDistribution: try LinuxDistribution(name: .debian, version: "12"),
           swiftVersion: "5.10"
         ),
@@ -339,7 +350,7 @@ final class LinuxRecipeTests: XCTestCase {
       (
         // Debian 11 with Swift 6.0 -> ubuntu20.04
         recipe: try createRecipe(
-          hostTriple: hostTriple,
+          hostTriples: hostTriples,
           linuxDistribution: try LinuxDistribution(name: .debian, version: "11"),
           swiftVersion: "6.0"
         ),
@@ -348,7 +359,7 @@ final class LinuxRecipeTests: XCTestCase {
       (
         // Debian 12 with Swift 5.10.1 -> debian12
         recipe: try createRecipe(
-          hostTriple: hostTriple,
+          hostTriples: hostTriples,
           linuxDistribution: try LinuxDistribution(name: .debian, version: "12"),
           swiftVersion: "5.10.1"
         ),
@@ -357,7 +368,7 @@ final class LinuxRecipeTests: XCTestCase {
       (
         // Debian 12 with Swift 6.0 -> debian12
         recipe: try createRecipe(
-          hostTriple: hostTriple,
+          hostTriples: hostTriples,
           linuxDistribution: try LinuxDistribution(name: .debian, version: "12"),
           swiftVersion: "6.0"
         ),
@@ -373,7 +384,7 @@ final class LinuxRecipeTests: XCTestCase {
         targetTriple: testCase.recipe.mainTargetTriple
       )
       let downloadableArtifacts = try DownloadableArtifacts(
-        hostTriple: testCase.recipe.mainHostTriple,
+        hostTriples: testCase.recipe.mainHostTriples,
         targetTriple: testCase.recipe.mainTargetTriple,
         testCase.recipe.versionsConfiguration,
         pathsConfiguration