diff --git a/src/mp_app.h b/src/mp_app.h
index cf5e3c3..03e5afd 100644
--- a/src/mp_app.h
+++ b/src/mp_app.h
@@ -411,6 +411,12 @@ int mp_alert_popup(const char* title,
                    u32 count,
                    const char** options);
 
+
+//--------------------------------------------------------------------
+// file system stuff... //TODO: move elsewhere
+//--------------------------------------------------------------------
+int mp_file_move(str8 from, str8 to);
+
 #ifdef __cplusplus
 } // extern "C"
 #endif
diff --git a/src/osx_app.m b/src/osx_app.m
index 13ce595..63db0c5 100644
--- a/src/osx_app.m
+++ b/src/osx_app.m
@@ -2616,4 +2616,24 @@ int mp_alert_popup(const char* title,
 }
 
 
+//--------------------------------------------------------------------
+// file system stuff... //TODO: move elsewhere
+//--------------------------------------------------------------------
+
+int mp_file_move(str8 from, str8 to)
+{@autoreleasepool{
+	NSString* nsFrom = [[NSString alloc] initWithBytes:from.ptr length:from.len encoding: NSUTF8StringEncoding];
+	NSString* nsTo = [[NSString alloc] initWithBytes:to.ptr length:to.len encoding: NSUTF8StringEncoding];
+	NSError* err;
+	if([[NSFileManager defaultManager] moveItemAtPath:nsFrom toPath:nsTo error:&err] == YES)
+	{
+		return(0);
+	}
+	else
+	{
+		return(-1);
+	}
+}}
+
+
 #undef LOG_SUBSYSTEM