images won't mount

[homeshire]

suddenly today i've discovered that images won't mount on my desktop. i double click disk images, they expand and verify, and i get a virtual folder with an .mpkg. but when i double-click it, all i get is a dialogue box saying "open failed". nothing about a corrupt image or anything like that. anyone know what might be going on? thanks

 

[balamw]

suddenly

Need. More. Info.

define images. (DMG, ISO, JPEG)?
OS version.
...

B

 

[homeshire]

dmg
10.4.4
no problems until suddenly today.
thanks for responding.