: Turn off Wi-Fi or unplug your Ethernet cable. This prevents the Trojan from sending out more spam or downloading additional malicious files while you work. Enter Safe Mode :
: Restart your Mac and immediately press and hold the Shift key until the login window appears. Trojan Horse Virus Spam Remover
Knowing the specific symptom can help me give you more targeted steps. : Turn off Wi-Fi or unplug your Ethernet cable