cocoa - NSMatrix hidden on 10.7 Lion -

i have 2 nsmatrix radio controls in different places in app. developing on 10.8, using 10.8 sdk , targeting 10.7. matrixes work on development computer, when test on mac running 10.7, neither matrix appears. i've checked auto-layout struts, i've made sure aren't set hidden. they're not appearing @ all.

i having similar problem, in ui 3 nsmatrix radio controls in different places (different views in different xib's) 2 displayed correctly on 10.7, 1 not. tried different things, in end deleted nsmatrix , placed again. unchecked both "automatically resizes cells" , "auto calculates cell size" in size inspector. , important: checked auto layout constraints in whole view , made sure objects have vertical/horizontal spacing (between each other) or leading/trailing space superview constraints, top object top space superview , bottom object bottom space superview constraint. et voila, it's showing on 10.7!

hope can solve problem in similar way. looks nsmatrix acting diva-like on 10.7 auto layout!