diff --git a/swift/Sources/Core/Services/MockIDPService.swift b/swift/Sources/Core/Services/MockIDPService.swift
index 501a45e..3a7f176 100644
--- a/swift/Sources/Core/Services/MockIDPService.swift
+++ b/swift/Sources/Core/Services/MockIDPService.swift
@@ -34,7 +34,7 @@ actor LiveIDPService: IDPServicing {
     private let appStateStore: AppStateStoring
     private let keyStore: PassportKeyStoring
 
-    init(
+    private init(
         appStateStore: AppStateStoring = UserDefaultsAppStateStore(),
         keyStore: PassportKeyStoring = DefaultPassportKeyStore()
     ) {
@@ -54,7 +54,10 @@ actor LiveIDPService: IDPServicing {
         let client = LiveTypedRequestClient(baseURL: baseURL)
         let keyMaterial = try loadOrCreateKeyMaterial(for: context.originHost)
         let signingPayload = try buildEnrollmentSigningPayload(from: context)
-        let signatureBase64 = try signPayload(signingPayload, with: keyMaterial.privateKeyData)
+        guard let privateKeyData = Data(base64Encoded: keyMaterial.privateKeyBase64) else {
+            throw AppError.invalidPairingPayload
+        }
+        let signatureBase64 = try signPayload(signingPayload, with: privateKeyData)
 
         let enrollmentResponse = try await client.fire(
             method: "completePassportEnrollment",
@@ -1134,7 +1137,7 @@ private struct ServerAlert: Decodable {
     let data: DataPayload
 }
 
-#if canImport(CoreLocation)
+#if canImport(CoreLocation) && os(iOS)
 @MainActor
 private final class CurrentLocationEvidenceProvider: NSObject, @preconcurrency CLLocationManagerDelegate {
     private var manager: CLLocationManager?