How do I turn off the Screen Saver?
Solution 1:
Check out this discussion: Screensaver "start time" option grayed out
The system administrator has probably set the screensaver timeout in a user profile. You can't change it without removing the profile, which will probably cause you to lose network access.
Check if you have a profile (overriding your personal settings) by Apple > System Preferences > Profiles
("Profiles" is in the bottom right)
- if you have a profile, one of these files has its settings: ~/Library/Preferences/ByHost/ look for a file with a long name that begins "com.apple.screensaver". There may be two such files. Move the one without the word "slideshow" in the name to the Trash.
It most probably applies to your problem too...
Solution 2:
It seems that this is unfixable unless you contact your company's sysadmin. A possible workaround is to either use the OSX built-in caffeinate command from the terminal or use the 3rd party software that doesn't allow your machine to be idle. Some examples are:
- Amphetamine (free),
- Theine (paid)
- Caffeinated (paid)
-
KeepingYouAwake (open source) - wrapper for
caffeinate
Solution 3:
On Mac VNC even if you disable screen saver it can appears and lock yours machine then you can try: Ctrl+Cmd+Q
This command disabe screen saver
sudo defaults write /Library/Preferences/com.apple.screensaver loginWindowIdleTime 0
Source