1. Set Screen Sharing Password For Vnc Viewer Mac Terminal Catalina 2017
2. Set Screen Sharing Password For Vnc Viewer Mac Terminal Catalina Bay

You are viewing the actual display screen, not a virtual screen. As far as I know, the only way to change the screen size is to use the remote system's System Preferences -> Displays -> Resolutions.

May 29, 2019 Open the “Sharing” preference panel and check the box next to “Screen Sharing.”. If you want to edit the name of your computer you can click the “Edit” button. You can leave the “Allow access for:” options as they are. Click “Computer Settings” and make sure “VNC viewers may control screen with password” is checked. Confirmed version of Screen Sharing app on Mojave 10.14.6 on 'server' machine as v 1.7.2 (498.150) whereas version on Catalina 'viewer' is 1.7.2 (499.49). My google-fu didn't bring up any red-flags regarding any issues on this. I routinely use Screen Sharing locally to manage my family's computers.

• SSH into the box, or open a local terminal. From here, you can launch the following to enable screen sharing with a specified password: sudo /System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/Resources/kickstart -activate -configure -access -on -clientopts -setvnclegacy -vnclegacy yes -clientopts -setvncpw -vncpw password1.
• VNC Server, VNC Viewer and supporting programs are controlled by parameters, set to suitable default values for most users out-of-the-box. You can configure a program by specifying new values for parameters either: Before the program starts.
• Network users and members of network groups can use their network name and password to connect to your Mac for screen sharing. To set additional options for screen sharing, click Computer Settings, then select one or both of the following: Anyone may request permission to control screen: Before other computer users begin sharing the screen of your Mac, they can ask for permission instead of entering a user name and password.

Set Screen Sharing Password For Vnc Viewer Mac Terminal Catalina 2017

However, I do know that Mac OS X Lion does seem to allow a virtual screen if you do not connect to the current active user, but rather to a another user that would be accessible via Fast User Switching. I do not know if you can mess with that user's System Preferences -> Displays -> Resolutions independent from the current active user controlling the physical display output (yes I know you have not connected a screen, but the primary user's output would be seen on an attached screen if it was connected, were as the Fast User Switching user does not have a screen until they are switched to the monitor, and when you remotely login in and DO NOT Fast User Switch, they never get control of that physical screen, so I'm making a wild guess that you might be able to do what you want, or not :-) ).

Set Screen Sharing Password For Vnc Viewer Mac Terminal Catalina Bay

Normally I also run a headless Mac mini, but at the moment it does have a monitor attached, and it is running Leopard, so I cannot experiment with Lion's Fast User Switching to see if my above guess is correct.