Hi Dan,
Regarding mapping a network drive on a Mac operating system, after doing more research, I found the following steps just for your reference, you can check if there is helpful for your question:
Map a network drive to Mac OS X that re-mounts after system reboot
This method allows you to reboot your Mac and have the mapped network drive automatically remount and appear on the desktop.
1. From the Finder, hit Command+K
2. Enter the path to the network drive you want to map, ie: smb://networkcomputer/networkshare and click ‘Connect’.
3. Enter your login credentials and click “OK”.
4. The drive is now mounted, but continue on to map for system reboot persistence.
5. Now enter into System Preferences, from the Apple menu.
6. Click on ‘Accounts’.
7. Click on “Login Items”.
8. Click on the + button to add another login item.
9. Locate the network drive you previously mounted and click “Add”.
10. Exit out of System Preferences.
Considering the situation referring to the Mac operating system, if there are more further and similar questions, to get a professional and efficient response, I recommend you contact the Mac support. This will be helpful for solving the issue quickly.
Thanks,
Ida Qiu