I just purchased an iMac M4 and would like to be able to sync with my 2019 Intel MacBook Pro. iCloud seems to want to sync everything to ALL devices including our iPhone although I have really only tried syncing passwords and mail. What is the best, simple and secure way to do this. I do have ChronoSync I might use if needed. I really am not so sure about security with the cloud... I'm old fashioned.