diff --git a/CMakeLists.txt b/CMakeLists.txt
index f739d7d..d3d4fcd 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.10)
 
-project(mbw VERSION 1.4.1)
+project(mbw VERSION 1.5)
 
 add_executable(mbw mbw.c)
 install(TARGETS mbw DESTINATION bin)
diff --git a/mbw.c b/mbw.c
index 884fd60..e928153 100644
--- a/mbw.c
+++ b/mbw.c
@@ -29,7 +29,7 @@
 #define TEST_MCBLOCK 2
 
 /* version number */
-#define VERSION "1.4"
+#define VERSION "1.5"
 
 /*
  * MBW memory bandwidth benchmark
@@ -116,14 +116,14 @@ double worker(unsigned long long asize, long *a, long *b, int type, unsigned lon
         /* timer stops */
         gettimeofday(&endtime, NULL);
     } else if(type==TEST_MCBLOCK) { /* memcpy block test */
-        char* aa = (char*)a;
-        char* bb = (char*)b;
+        char* src = (char*)a;
+        char* dst = (char*)b;
         gettimeofday(&starttime, NULL);
-        for (t=array_bytes; t >= block_size; t-=block_size, aa+=block_size){
-            bb=(char *) memcpy(bb, aa, block_size) + block_size;
+        for (t=array_bytes; t >= block_size; t-=block_size, src+=block_size){
+            dst=(char *) memcpy(dst, src, block_size) + block_size;
         }
         if(t) {
-            bb=(char *) memcpy(bb, aa, t) + t;
+            dst=(char *) memcpy(dst, src, t) + t;
         }
         gettimeofday(&endtime, NULL);
     } else if(type==TEST_DUMB) { /* dumb test */
diff --git a/mbw.spec b/mbw.spec
index 5edfa2a..2d1ca4e 100644
--- a/mbw.spec
+++ b/mbw.spec
@@ -1,6 +1,6 @@
 Summary: Memory bandwidth benchmark
 Name: mbw
-Version: 1.4
+Version: 1.5
 Release: 1%{?dist}
 License: LGPLv2.1
 Buildroot: %{_tmppath}/%{name}-buildroot
@@ -33,6 +33,9 @@ rm -rf %{buildroot}
 %attr(644,-,-) %{_mandir}/man1/mbw.1.gz
 
 %changelog
+* Tue Apr 26 2022 Andras Horvath <andras.horvath@gmail.com> 1.5-1
+- New platform support (Mac)
+
 * Fri May 04 2018 Andras Horvath <andras.horvath@gmail.com> 1.4-2
 - Explicitly specify licence version