diff --git a/FirebaseAppCheck/Sources/AppAttestProvider/DCAppAttestService+FIRAppAttestService.h b/FirebaseAppCheck/Sources/AppAttestProvider/DCAppAttestService+FIRAppAttestService.h
index 22cc5878b72..be0cbddb67d 100644
--- a/FirebaseAppCheck/Sources/AppAttestProvider/DCAppAttestService+FIRAppAttestService.h
+++ b/FirebaseAppCheck/Sources/AppAttestProvider/DCAppAttestService+FIRAppAttestService.h
@@ -14,17 +14,12 @@
  * limitations under the License.
  */
 
-#import <TargetConditionals.h>
-
-#import "FirebaseAppCheck/Sources/Public/FirebaseAppCheck/FIRAppCheckAvailability.h"
-
-// Currently DCAppAttestService is available on iOS only.
-#if FIR_APP_ATTEST_SUPPORTED_TARGETS
-
 #import <DeviceCheck/DeviceCheck.h>
 
 #import "FirebaseAppCheck/Sources/AppAttestProvider/FIRAppAttestService.h"
 
+#import "FirebaseAppCheck/Sources/Public/FirebaseAppCheck/FIRAppCheckAvailability.h"
+
 NS_ASSUME_NONNULL_BEGIN
 
 FIR_APP_ATTEST_PROVIDER_AVAILABILITY
@@ -33,5 +28,3 @@ FIR_APP_ATTEST_PROVIDER_AVAILABILITY
 @end
 
 NS_ASSUME_NONNULL_END
-
-#endif  // FIR_APP_ATTEST_SUPPORTED_TARGETS
diff --git a/FirebaseAppCheck/Sources/AppAttestProvider/DCAppAttestService+FIRAppAttestService.m b/FirebaseAppCheck/Sources/AppAttestProvider/DCAppAttestService+FIRAppAttestService.m
index df5f6902621..ac4feae689a 100644
--- a/FirebaseAppCheck/Sources/AppAttestProvider/DCAppAttestService+FIRAppAttestService.m
+++ b/FirebaseAppCheck/Sources/AppAttestProvider/DCAppAttestService+FIRAppAttestService.m
@@ -16,11 +16,6 @@
 
 #import "FirebaseAppCheck/Sources/AppAttestProvider/DCAppAttestService+FIRAppAttestService.h"
 
-// Currently DCAppAttestService is available on iOS only.
-#if FIR_APP_ATTEST_SUPPORTED_TARGETS
-
 @implementation DCAppAttestService (FIRAppAttestService)
 
 @end
-
-#endif  // FIR_APP_ATTEST_SUPPORTED_TARGETS
diff --git a/FirebaseAppCheck/Sources/AppAttestProvider/FIRAppAttestProvider.m b/FirebaseAppCheck/Sources/AppAttestProvider/FIRAppAttestProvider.m
index e7ce51ae9f8..b59e8101009 100644
--- a/FirebaseAppCheck/Sources/AppAttestProvider/FIRAppAttestProvider.m
+++ b/FirebaseAppCheck/Sources/AppAttestProvider/FIRAppAttestProvider.m
@@ -136,7 +136,6 @@ - (instancetype)initWithAppAttestService:(id<FIRAppAttestService>)appAttestServi
 }
 
 - (nullable instancetype)initWithApp:(FIRApp *)app {
-#if FIR_APP_ATTEST_SUPPORTED_TARGETS
   NSURLSession *URLSession = [NSURLSession
       sessionWithConfiguration:[NSURLSessionConfiguration ephemeralSessionConfiguration]];
 
@@ -166,9 +165,6 @@ - (nullable instancetype)initWithApp:(FIRApp *)app {
                            keyIDStorage:keyIDStorage
                         artifactStorage:artifactStorage
                          backoffWrapper:backoffWrapper];
-#else   // FIR_APP_ATTEST_SUPPORTED_TARGETS
-  return nil;
-#endif  // FIR_APP_ATTEST_SUPPORTED_TARGETS
 }
 
 #pragma mark - FIRAppCheckProvider
diff --git a/FirebaseAppCheck/Sources/DeviceCheckProvider/DCDevice+FIRDeviceCheckTokenGenerator.h b/FirebaseAppCheck/Sources/DeviceCheckProvider/DCDevice+FIRDeviceCheckTokenGenerator.h
index 20801f8c633..9b352dd617f 100644
--- a/FirebaseAppCheck/Sources/DeviceCheckProvider/DCDevice+FIRDeviceCheckTokenGenerator.h
+++ b/FirebaseAppCheck/Sources/DeviceCheckProvider/DCDevice+FIRDeviceCheckTokenGenerator.h
@@ -14,10 +14,6 @@
  * limitations under the License.
  */
 
-#import "FirebaseAppCheck/Sources/Public/FirebaseAppCheck/FIRAppCheckAvailability.h"
-
-#if FIR_DEVICE_CHECK_SUPPORTED_TARGETS
-
 #import <DeviceCheck/DeviceCheck.h>
 
 #import "FirebaseAppCheck/Sources/DeviceCheckProvider/FIRDeviceCheckTokenGenerator.h"
@@ -29,5 +25,3 @@ NS_ASSUME_NONNULL_BEGIN
 @end
 
 NS_ASSUME_NONNULL_END
-
-#endif  // FIR_DEVICE_CHECK_SUPPORTED_TARGETS
diff --git a/FirebaseAppCheck/Sources/DeviceCheckProvider/DCDevice+FIRDeviceCheckTokenGenerator.m b/FirebaseAppCheck/Sources/DeviceCheckProvider/DCDevice+FIRDeviceCheckTokenGenerator.m
index eab3d07817c..c2c44312057 100644
--- a/FirebaseAppCheck/Sources/DeviceCheckProvider/DCDevice+FIRDeviceCheckTokenGenerator.m
+++ b/FirebaseAppCheck/Sources/DeviceCheckProvider/DCDevice+FIRDeviceCheckTokenGenerator.m
@@ -16,10 +16,6 @@
 
 #import "FirebaseAppCheck/Sources/DeviceCheckProvider/DCDevice+FIRDeviceCheckTokenGenerator.h"
 
-#if FIR_DEVICE_CHECK_SUPPORTED_TARGETS
-
 @implementation DCDevice (FIRDeviceCheckTokenGenerator)
 
 @end
-
-#endif  // FIR_DEVICE_CHECK_SUPPORTED_TARGETS
diff --git a/FirebaseAppCheck/Sources/DeviceCheckProvider/FIRDeviceCheckProvider.m b/FirebaseAppCheck/Sources/DeviceCheckProvider/FIRDeviceCheckProvider.m
index 812f44faf67..b3dbb70141e 100644
--- a/FirebaseAppCheck/Sources/DeviceCheckProvider/FIRDeviceCheckProvider.m
+++ b/FirebaseAppCheck/Sources/DeviceCheckProvider/FIRDeviceCheckProvider.m
@@ -14,10 +14,6 @@
  * limitations under the License.
  */
 
-#import "FirebaseAppCheck/Sources/Public/FirebaseAppCheck/FIRAppCheckAvailability.h"
-
-#if FIR_DEVICE_CHECK_SUPPORTED_TARGETS
-
 #import <Foundation/Foundation.h>
 
 #if __has_include(<FBLPromises/FBLPromises.h>)
@@ -159,5 +155,3 @@ - (void)getTokenWithCompletion:(void (^)(FIRAppCheckToken *_Nullable token,
 @end
 
 NS_ASSUME_NONNULL_END
-
-#endif  // FIR_DEVICE_CHECK_SUPPORTED_TARGETS
diff --git a/FirebaseAppCheck/Sources/DeviceCheckProvider/FIRDeviceCheckProviderFactory.m b/FirebaseAppCheck/Sources/DeviceCheckProvider/FIRDeviceCheckProviderFactory.m
index 90f7dee88e7..908c0af2d19 100644
--- a/FirebaseAppCheck/Sources/DeviceCheckProvider/FIRDeviceCheckProviderFactory.m
+++ b/FirebaseAppCheck/Sources/DeviceCheckProvider/FIRDeviceCheckProviderFactory.m
@@ -14,10 +14,6 @@
  * limitations under the License.
  */
 
-#import "FirebaseAppCheck/Sources/Public/FirebaseAppCheck/FIRAppCheckAvailability.h"
-
-#if FIR_DEVICE_CHECK_SUPPORTED_TARGETS
-
 #import "FirebaseAppCheck/Sources/Public/FirebaseAppCheck/FIRDeviceCheckProviderFactory.h"
 
 #import "FirebaseAppCheck/Sources/Public/FirebaseAppCheck/FIRAppCheck.h"
@@ -34,5 +30,3 @@ + (void)load {
 }
 
 @end
-
-#endif  // FIR_DEVICE_CHECK_SUPPORTED_TARGETS
diff --git a/FirebaseAppCheck/Sources/Public/FirebaseAppCheck/FIRAppCheckAvailability.h b/FirebaseAppCheck/Sources/Public/FirebaseAppCheck/FIRAppCheckAvailability.h
index 44cdeaf6cdc..45f7457b010 100644
--- a/FirebaseAppCheck/Sources/Public/FirebaseAppCheck/FIRAppCheckAvailability.h
+++ b/FirebaseAppCheck/Sources/Public/FirebaseAppCheck/FIRAppCheckAvailability.h
@@ -22,6 +22,8 @@
 #pragma mark - DeviceCheck
 
 // Targets where DeviceCheck framework is available to be used in preprocessor conditions.
+// TODO: Remove this macro during a breaking change; it is no longer used in the codebase but is
+// defined in the public API.
 #define FIR_DEVICE_CHECK_SUPPORTED_TARGETS \
   TARGET_OS_IOS || TARGET_OS_OSX || TARGET_OS_TV || TARGET_OS_WATCH
 
@@ -32,6 +34,8 @@
 #pragma mark - App Attest
 
 // Targets where `DCAppAttestService` is available to be used in preprocessor conditions.
+// TODO: Remove this macro during a breaking change; it is no longer used in the codebase but is
+// defined in the public API.
 #define FIR_APP_ATTEST_SUPPORTED_TARGETS \
   TARGET_OS_IOS || TARGET_OS_OSX || TARGET_OS_TV || TARGET_OS_WATCH
 
diff --git a/FirebaseAppCheck/Sources/Public/FirebaseAppCheck/FIRDeviceCheckProvider.h b/FirebaseAppCheck/Sources/Public/FirebaseAppCheck/FIRDeviceCheckProvider.h
index 0a2823f7033..44ed77766bd 100644
--- a/FirebaseAppCheck/Sources/Public/FirebaseAppCheck/FIRDeviceCheckProvider.h
+++ b/FirebaseAppCheck/Sources/Public/FirebaseAppCheck/FIRDeviceCheckProvider.h
@@ -19,8 +19,6 @@
 #import "FIRAppCheckAvailability.h"
 #import "FIRAppCheckProvider.h"
 
-#if FIR_DEVICE_CHECK_SUPPORTED_TARGETS
-
 @class FIRApp;
 @protocol FIRDeviceCheckAPIServiceProtocol;
 @protocol FIRDeviceCheckTokenGenerator;
@@ -46,5 +44,3 @@ NS_SWIFT_NAME(DeviceCheckProvider)
 @end
 
 NS_ASSUME_NONNULL_END
-
-#endif  // FIR_DEVICE_CHECK_SUPPORTED_TARGETS
diff --git a/FirebaseAppCheck/Sources/Public/FirebaseAppCheck/FIRDeviceCheckProviderFactory.h b/FirebaseAppCheck/Sources/Public/FirebaseAppCheck/FIRDeviceCheckProviderFactory.h
index 0df8bf5b8cb..e20bb9869e7 100644
--- a/FirebaseAppCheck/Sources/Public/FirebaseAppCheck/FIRDeviceCheckProviderFactory.h
+++ b/FirebaseAppCheck/Sources/Public/FirebaseAppCheck/FIRDeviceCheckProviderFactory.h
@@ -14,12 +14,9 @@
  * limitations under the License.
  */
 
-#import "FIRAppCheckAvailability.h"
-
-#if FIR_DEVICE_CHECK_SUPPORTED_TARGETS
-
 #import <Foundation/Foundation.h>
 
+#import "FIRAppCheckAvailability.h"
 #import "FIRAppCheckProviderFactory.h"
 
 NS_ASSUME_NONNULL_BEGIN
@@ -37,5 +34,3 @@ NS_SWIFT_NAME(DeviceCheckProviderFactory)
 @end
 
 NS_ASSUME_NONNULL_END
-
-#endif  // FIR_DEVICE_CHECK_SUPPORTED_TARGETS
diff --git a/FirebaseAppCheck/Tests/Unit/AppAttestProvider/FIRAppAttestProviderTests.m b/FirebaseAppCheck/Tests/Unit/AppAttestProvider/FIRAppAttestProviderTests.m
index 9bee32fcdd3..d20fb1d179b 100644
--- a/FirebaseAppCheck/Tests/Unit/AppAttestProvider/FIRAppAttestProviderTests.m
+++ b/FirebaseAppCheck/Tests/Unit/AppAttestProvider/FIRAppAttestProviderTests.m
@@ -23,22 +23,20 @@
 
 #import "FirebaseAppCheck/Sources/AppAttestProvider/API/FIRAppAttestAPIService.h"
 #import "FirebaseAppCheck/Sources/AppAttestProvider/API/FIRAppAttestAttestationResponse.h"
+#import "FirebaseAppCheck/Sources/AppAttestProvider/Errors/FIRAppAttestRejectionError.h"
 #import "FirebaseAppCheck/Sources/AppAttestProvider/FIRAppAttestService.h"
 #import "FirebaseAppCheck/Sources/AppAttestProvider/Storage/FIRAppAttestArtifactStorage.h"
 #import "FirebaseAppCheck/Sources/AppAttestProvider/Storage/FIRAppAttestKeyIDStorage.h"
-#import "FirebaseAppCheck/Sources/Core/Utils/FIRAppCheckCryptoUtils.h"
-#import "FirebaseAppCheck/Sources/Public/FirebaseAppCheck/FIRAppCheckToken.h"
-
-#import "FirebaseAppCheck/Sources/AppAttestProvider/Errors/FIRAppAttestRejectionError.h"
 #import "FirebaseAppCheck/Sources/Core/Errors/FIRAppCheckErrorUtil.h"
 #import "FirebaseAppCheck/Sources/Core/Errors/FIRAppCheckHTTPError.h"
+#import "FirebaseAppCheck/Sources/Core/Utils/FIRAppCheckCryptoUtils.h"
+#import "FirebaseAppCheck/Sources/Public/FirebaseAppCheck/FIRAppCheckAvailability.h"
+#import "FirebaseAppCheck/Sources/Public/FirebaseAppCheck/FIRAppCheckToken.h"
 
 #import "FirebaseCore/Extension/FirebaseCoreInternal.h"
 
 #import "SharedTestUtilities/AppCheckBackoffWrapperFake/FIRAppCheckBackoffWrapperFake.h"
 
-#if FIR_APP_ATTEST_SUPPORTED_TARGETS
-
 FIR_APP_ATTEST_PROVIDER_AVAILABILITY
 @interface FIRAppAttestProvider (Tests)
 - (instancetype)initWithAppAttestService:(id<FIRAppAttestService>)appAttestService
@@ -1089,5 +1087,3 @@ - (void)expectAttestationReset {
 }
 
 @end
-
-#endif  // FIR_APP_ATTEST_SUPPORTED_TARGETS
diff --git a/FirebaseAppCheck/Tests/Unit/Core/FIRAppCheckIntegrationTests.m b/FirebaseAppCheck/Tests/Unit/Core/FIRAppCheckIntegrationTests.m
index e739c614b93..2f43cb6f07c 100644
--- a/FirebaseAppCheck/Tests/Unit/Core/FIRAppCheckIntegrationTests.m
+++ b/FirebaseAppCheck/Tests/Unit/Core/FIRAppCheckIntegrationTests.m
@@ -18,12 +18,11 @@
 
 #import <OCMock/OCMock.h>
 
-#import <TargetConditionals.h>
-
 @import FirebaseAppCheckInterop;
 
 #import "FirebaseAppCheck/Sources/Core/TokenRefresh/FIRAppCheckTokenRefresher.h"
 #import "FirebaseAppCheck/Sources/Public/FirebaseAppCheck/FIRAppCheck.h"
+#import "FirebaseAppCheck/Sources/Public/FirebaseAppCheck/FIRAppCheckAvailability.h"
 #import "FirebaseAppCheck/Sources/Public/FirebaseAppCheck/FIRAppCheckProviderFactory.h"
 #import "FirebaseAppCheck/Sources/Public/FirebaseAppCheck/FIRAppCheckToken.h"
 
@@ -34,8 +33,6 @@
 
 NS_ASSUME_NONNULL_BEGIN
 
-#if FIR_DEVICE_CHECK_SUPPORTED_TARGETS
-
 @interface DummyAppCheckProvider : NSObject <FIRAppCheckProvider>
 @end
 
@@ -226,6 +223,4 @@ - (void)disableTokenRefresher {
 
 @end
 
-#endif  // FIR_DEVICE_CHECK_SUPPORTED_TARGETS
-
 NS_ASSUME_NONNULL_END
diff --git a/FirebaseAppCheck/Tests/Unit/DeviceCheckProvider/FIRDeviceCheckProviderTests.m b/FirebaseAppCheck/Tests/Unit/DeviceCheckProvider/FIRDeviceCheckProviderTests.m
index a9ed180d66e..976b631b5e2 100644
--- a/FirebaseAppCheck/Tests/Unit/DeviceCheckProvider/FIRDeviceCheckProviderTests.m
+++ b/FirebaseAppCheck/Tests/Unit/DeviceCheckProvider/FIRDeviceCheckProviderTests.m
@@ -23,14 +23,13 @@
 #import "FirebaseAppCheck/Sources/Core/FIRAppCheckToken+Internal.h"
 #import "FirebaseAppCheck/Sources/DeviceCheckProvider/API/FIRDeviceCheckAPIService.h"
 #import "FirebaseAppCheck/Sources/DeviceCheckProvider/FIRDeviceCheckTokenGenerator.h"
+#import "FirebaseAppCheck/Sources/Public/FirebaseAppCheck/FIRAppCheckAvailability.h"
 #import "FirebaseAppCheck/Sources/Public/FirebaseAppCheck/FIRDeviceCheckProvider.h"
 
 #import "FirebaseCore/Extension/FirebaseCoreInternal.h"
 
 #import "SharedTestUtilities/AppCheckBackoffWrapperFake/FIRAppCheckBackoffWrapperFake.h"
 
-#if FIR_DEVICE_CHECK_SUPPORTED_TARGETS
-
 FIR_DEVICE_CHECK_PROVIDER_AVAILABILITY
 @interface FIRDeviceCheckProvider (Tests)
 
@@ -326,5 +325,3 @@ - (void)testGetTokenBackoff {
 }
 
 @end
-
-#endif  // FIR_DEVICE_CHECK_SUPPORTED_TARGETS