diff --git a/bsdiff/linux/bsdiff b/bsdiff/linux/bsdiff
old mode 100644
new mode 100755
diff --git a/bsdiff/linux/bspatch b/bsdiff/linux/bspatch
old mode 100644
new mode 100755
diff --git a/bsdiff/mac/bsdiff b/bsdiff/mac/bsdiff
new file mode 100755
index 0000000..2627b87
Binary files /dev/null and b/bsdiff/mac/bsdiff differ
diff --git a/bsdiff/mac/bspatch b/bsdiff/mac/bspatch
new file mode 100755
index 0000000..79b69f5
Binary files /dev/null and b/bsdiff/mac/bspatch differ
diff --git a/src/main/java/com/mir4updater/backend/controller/apk/CreateDiffPatchFile.java b/src/main/java/com/mir4updater/backend/controller/apk/CreateDiffPatchFile.java
index 0653587..c724d70 100644
--- a/src/main/java/com/mir4updater/backend/controller/apk/CreateDiffPatchFile.java
+++ b/src/main/java/com/mir4updater/backend/controller/apk/CreateDiffPatchFile.java
@@ -58,9 +58,11 @@ public class CreateDiffPatchFile {
         String command;
         if (os.contains("win")) {
             command = "bsdiff" + File.separator + "win" + File.separator + "bsdiff.exe";
-        } else if (os.contains("nix") || os.contains("mac")) {
+        } else if (os.contains("linux") ) {
             command = "bsdiff" + File.separator + "linux" + File.separator + "bsdiff";
-        } else {
+        }else if ( os.contains("mac")) {
+            command = "bsdiff" + File.separator + "mac" + File.separator + "bsdiff";
+        }  else {
             throw new UnsupportedOperationException("Unsupported OS");
         }
         File file = new File(command);