diff --git a/README.md b/README.md
index 5f11195..5b15330 100644
--- a/README.md
+++ b/README.md
@@ -11,10 +11,22 @@ Fixed built-in Master I²C driver for Arduino ESP8266 core. Sorry it doesn't sup
 
 [Click here to download the ZIP file](https://github.com/enjoyneering/ESP8266-I2C-Driver/archive/master.zip)
 
+### Windows
 Copy and replace "**twi.h**", "**core_esp8266_si2c.cpp**" in folder %USERPROFILE%\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.5.2\cores\esp8266
 
 Copy and replace "**Wire.h**", "**Wire.cpp**" in folder %USERPROFILE%\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.5.2\libraries\Wire
 
+### MacOS
+Copy and replace "**twi.h**", "**core_esp8266_si2c.cpp**" in folder
+```bash
+open ~/Library/Arduino15/packages/esp8266/hardware/esp8266/2.*.*/cores/esp8266
+```
+
+Copy and replace "**Wire.h**", "**Wire.cpp**" in folder
+```bash
+open ~/Library/Arduino15/packages/esp8266/hardware/esp8266/2.*.*/libraries/Wire
+```
+
 If you want to keep the original files - just change the file extension* to "**twi.h.OLD**" and etc. Then you always can go back.
 
 *_if you change the file name you get an error at compile time_