Skip Keychain tests on macOS and SPM

FirebaseAppCheck/Tests/Unit/AppAttestProvider/Storage/FIRAppAttestKeyIDStorageTests.m

@@ -14,6 +14,17 @@
  * limitations under the License.
  */
 
+#import <TargetConditionals.h>
+
+// Tests that use the Keychain require a host app and Swift Package Manager
+// does not support adding a host app to test targets.
+#if !SWIFT_PACKAGE
+
+// Skip keychain tests on Catalyst and macOS. Tests are skipped because they
+// involve interactions with the keychain that require a provisioning profile.
+// See go/firebase-macos-keychain-popups for more details.
+#if !TARGET_OS_MACCATALYST && !TARGET_OS_OSX
+
 #import <XCTest/XCTest.h>
 
 #import <OCMock/OCMock.h>
@@ -172,3 +183,7 @@ - (void)assertIndependentSetGetForStoragesWithAppName1:(NSString *)appName1
 }
 
 @end
+
+#endif  // !TARGET_OS_MACCATALYST && !TARGET_OS_OSX
+
+#endif  // !SWIFT_PACKAGE