I have found the apparent source of the problem. Does anyone know what is causing this behavior and how to rectify it? Backing up my data is crucial for the work that we do here. I have been performing nightly network backups with this computer since getting it in February 2015.įrom what I can gather around the Internet, there is a longstanding issue with errant behavior with Macs connected to SMB servers. The same occurred when I came in this morning. I noticed yesterday when I awakened my iMac that none of the network drives were mounted and that my overnight backup had failed as a result. Everything was fine until the past two nights because now my iMac has begun to disconnect from the network drives when the computer goes to sleep.

I have my iMac set up to run nightly backups of my user account to my backup drive on the network the backups run in the evening after I have left the office. For the entirety of this month the network drives were also mounted after waking the computer from sleep. All four network drives are in the Login Items list for my user account, so they do properly mount when the computer is cold booted or restarted. In fact, since the rebuild of this iMac the first week of January, my iMac’s connection to the network drives has been the best behaved since getting the computer two years ago. After having to rebuild my system at the beginning of this year due to a hard drive issue, I had no problems with connecting to the network drives. I have a wired connection (Ethernet) to our network. I have an iMac 5K Retina (late-2014) that is connected to remote drives on our company network (SMB).

Disconnect mac network drive