I have a strange issue with a new iMac (refurbished 2019 model 5k 27") running Catalina: Once I try to start a Time Machine Backup and it's status changes to "Preparing Backup…" the Wifi connection drops and the backup cannot be created. That happens every time I try to create a backup (either via menu bar "Backup Up Now" or via "tmutil startbackup" on Terminal) leaving me effectively unable to create backups for the machine. The backup destination is on a MyCloud EX2 Ultra NAS via SMB. The very same backup method works just fine on a 2017 iMac running High Sierra, so I guess it's a OS bug or anything like that.
The Wifi connection keeps running (I ran ping on Terminal for testing purposes and it had no problems for at least an hour) as long I don't trigger any TM backup.
Has anyone seen this before? If so, any suggestions how to fix that?
The Wifi connection keeps running (I ran ping on Terminal for testing purposes and it had no problems for at least an hour) as long I don't trigger any TM backup.
Has anyone seen this before? If so, any suggestions how to fix that?