hi @kerdagoan ,
Greetings from Mcafee,
As you have mentioned the free trial installed in the Mac computer . it's always good to have a antivirus installed in the computer and have the device protected. McAfee provides complete protection against viruses, online threats and ransomware with both cloud-based online and offline protection. McAfee is a premium antivirus that detects malware in real time and ensures your devices are safe.
Alternatively, you can always contact chat support using the link below for immediate assistance or call our helpline number 24/7 (866-622-3911)US.
Regards
Nagesh G