iMac 2013 27" Someone severely hacked into my imac, they had accessed every email account I used on my iMac including my FB account and my iCloud account. I deactivated my FB account 4 times only to see it reactivated by someone else. It got so bad that I took my imac to an Apple approved service repair center and had them install a new hard drive but the idiot technician transferred the data from the compromised HD to the new HD. According to my modem/router log I configured on the modem my system is being used to send out "TCP- or UDP-based Port Scan" or "SYN Flood" packets. How do I stop this? I have the firewall on the modem/router to high and Ive got my the firewall on my imac set up so it doesnt accept any incoming connections to programs that could be used by a hacker but the TCP- or UDP-based Port Scan or SYN Flood still exists. I check my system resources and it looks normal but when I run an IP scanner on my system I can see that my system is being accessed by telnet and or open ssh but yet I've never configured my system for such use. On my com.apple.applefileserver plist file Im supposedly using LKDC:SHA1.5488DD95F4D70CC7EE141AF1C9CC1EFBECC28819@LKDC:SHA1.5488DD95F4D70CC7EE141AF1C9CC1EFBECC28819 (Kerberos) as a server and have a hidden LDAPv3 configuration running that I knew nothing about till last night. Ive disabled the wi-fi in system preferences so now I only connect to the internet via ethernet I have deleted and reformated every partition on my harddrive but yet the problem still exists. Any suggestions would be greatly appreciated.