update README.md

README.md

@@ -5,8 +5,16 @@ For detailed information about the structure and contents of AWS Application Loa
 [Access logs for your Application Load Balancer - AWS Documentation](https://docs.aws.amazon.com/elasticloadbalancing/latest/application/load-balancer-access-logs.html)
 
 ## Install
+### MacOS
+
+```sh
+brew install okkun-sh/tap/albconv
+```
 
 ## Usage
+```sh
+albconv alb.log.gz alb2.log.gz
+```
 
 ## License