Hello Please help me as I just used everything I know to solve this problem ! Here is the thing, my iMac is slow in internet then I discovered from the activity monitor that the data sent rate is more is the received data rate ! it's like this for example : Data sent/sec : 30.5 KB/sec - Data received /sec : 2.3 KB/sec . this shows without any app is opened at all, and I already deleted the cookies in safari, did I restart for the internet modem, did a PRAM REST and still nothing changed ! Note that the problem is only in my mac which mean when I disconnected the network cable and use my iPad its all OK, but when I reconnect the cable for the mac every device connected to this wireless network are slow in internet because of a problem with this iMac Please I need help !