diff --git a/find_best_cdn_ip.sh b/find_best_cdn_ip.sh
index dea852f..a0fb6e1 100755
--- a/find_best_cdn_ip.sh
+++ b/find_best_cdn_ip.sh
@@ -97,25 +97,12 @@ init(){
     pingTool
 }
 checkSystem(){
-
-	if [[ ! -z `find /etc -name "redhat-release"` ]] || [[ ! -z `cat /proc/version | grep -i "centos" | grep -v grep ` ]] || [[ ! -z `cat /proc/version | grep -i "red hat" | grep -v grep ` ]] || [[ ! -z `cat /proc/version | grep -i "redhat" | grep -v grep ` ]]
-	then
-		release="centos"
-		installType='yum -y install'
-		removeType='yum -y remove'
-		upgrade="yum update -y --skip-broken"
-	elif [[ ! -z `cat /etc/issue | grep -i "debian" | grep -v grep` ]] || [[ ! -z `cat /proc/version | grep -i "debian" | grep -v grep` ]]
+    if [[ "`uname`" = "Darwin" ]]
     then
-		release="debian"
-		installType='apt -y install'
-		upgrade="apt update -y"
-		removeType='apt -y autoremove'
+        release="Darwin"
 	elif [[ ! -z `cat /etc/issue | grep -i "ubuntu" | grep -v grep` ]] || [[ ! -z `cat /proc/version | grep -i "ubuntu" | grep -v grep` ]]
 	then
 		release="ubuntu"
-		installType='apt -y install'
-		upgrade="apt update -y"
-		removeType='apt --purge remove'
     fi
     if [[ -z ${release} ]]
     then