Is there a virus computer in macOS?

Due to macOS not allow Apps run by them safe without permission, so it will hard to see the virus that can harm macOS, however if some file that infect virus that treat the Windows system even it not harm to macOS but if copy it to ecternal hard drive or USB flash drive to transfer into Windows it still possible that infected file will damage to Windows system. Recommend for customer that need to copy or transfer files from macOS to use in Windows make scan virus on Windows system even there are no any issue on macOS system.