fix cd path (#50)

mac/README.md

@@ -6,7 +6,7 @@ Download the repo. It will install in `/usr/local/bin/keylogger`.
 
 Install it:
 
-`$ git clone https://github.com/GiacomoLaw/Keylogger && cd keylogger`
+`$ git clone https://github.com/GiacomoLaw/Keylogger && cd keylogger/mac`
 
 `$ make && make install`
 
@@ -34,4 +34,4 @@ Please note, this repo is for educational purposes only. No contributors are to
 
 > [If anyone knows where to get a key code list for `c` for `azerty` keyboards, please let me know!](https://github.com/GiacomoLaw/Keylogger/issues/29)
 
-Thanks to [Casey Scarborough](https://github.com/caseyscarborough/keylogger) for the base program!
+Thanks to [Casey Scarborough](https://github.com/caseyscarborough/keylogger) for the base program!