Ransomware criminals are now targeting Apple's macOS systems, posing a new threat to its users.The ransomware known as macOS.NotLockBit encrypts files and deletes data if the ransom is not paid.Cybersecurity experts warn that this threat could become more significant if Apple does not implement timely defenses.The healthcare sector in the US has seen a surge in ransomware attacks, with 389 organizations affected and significant financial losses incurred.