diff --git a/mac/KeymanEngine4Mac/KeymanEngine4Mac/CoreWrapper/CoreWrapper.m b/mac/KeymanEngine4Mac/KeymanEngine4Mac/CoreWrapper/CoreWrapper.m
index adcf8c14b60..ed2227f318e 100644
--- a/mac/KeymanEngine4Mac/KeymanEngine4Mac/CoreWrapper/CoreWrapper.m
+++ b/mac/KeymanEngine4Mac/KeymanEngine4Mac/CoreWrapper/CoreWrapper.m
@@ -115,6 +115,7 @@ -(void)loadKeyboardUsingCore:(NSString*) path {
   
   if (dataError != nil) {
     os_log_error([KMELogs coreLog], "loadKeyboardUsingCore, path: %{public}@\n dataError: %{public}@", path, dataError);
+    [NSException raise:@"LoadKeyboardException" format:@"%@", dataError];
   } else {
     NSUInteger dataLength = data.length;
     os_log_info([KMELogs coreLog], "loadKeyboardUsingCore, path: %{public}@\n dataLength: %lu", path, dataLength);