How To Lock Folders

[gigastar]

I would like to prevent accidentally trashing some folders on my computer, is there a way of doing this on OSX 10.3.9

 

[Lt Major Burns]

Get Info for the folder (ctrl-click), and at the bottom of the "file Description segment, tick the box labeled "lock". it will now have a small grey padlock on the icon, and with not let you trash it.

 

[Lt Major Burns]

I have tried to lock my folder but the box is greyed out, is there a way of changing this so that I can select the the lock box.

You can only modify folders in this way if you have the permission of the system to do so. it sounds like you are trying to lock system folders like the Library, which are not lockable, by default, and shouldn't ever be locked. these folders though will warn you by requesting Admin passwords before you modify them...