How to prevent drive from auto mounting at startup?

[PicnicTutorials]

I have a CCC Bootable copy on a connected external drive and I don't want the bootable partition mounting when I start my computer. The only solutions I've been able to find are those messing with in/with Terminal and seem overly complicated. There has to be a simple way?

 

[roadkill401]

I have been told by apple that there is no method to a locally attached (be it internet or external) drive not mount inside of OSx on startup. As well, I have been told that there is no method either of having remote network drives get automatically mounted on startup. I guess this is just one of those limitations of Apple OS.

 

[Samuelsan2001]

I have a CCC Bootable copy on a connected external drive and I don't want the bootable partition mounting when I start my computer. The only solutions I've been able to find are those messing with in/with Terminal and seem overly complicated. There has to be a simple way?

Buy a cheap second drive for the Bootable copy then unplug it when required.

 

[Thessman]

I have been told by apple that there is no method to a locally attached (be it internet or external) drive not mount inside of OSx on startup. As well, I have been told that there is no method either of having remote network drives get automatically mounted on startup. I guess this is just one of those limitations of Apple OS.

See this discussion:
https://forums.macrumors.com/threads/hiding-drives-on-the-desktop.1862306/#post-21123046

here is the summary:
. Open the Terminal utility (in the /Applications/Utilities/ folder)
. Edit the fstab file by running the following command (supply your password when prompted):
sudo pico /etc/fstab

. Create a new line at the end of the file that looks like the following (note: replace "NUMBER" with the full UUID string you copied from Disk Utility):
UUID=NUMBER none hfs rw,noauto
. Save the file by pressing Control-O, followed by Control-X to quit the editor.

 

[roadkill401]

Thanks. I will give that a try. Being a newly converted Mac user, I have yet to figure out the full potential of this new Apple beast that I have just got.