Mac can't verify update and says it's corrupted or tampered
Today I installed Mavericks again and tried to update it !
Most of the updates were successful but when I try to install security update 2015-006 1.0 & safari 7.1.8 system says it can't verify security update 2015-006 1.0 and it's corrupted or tampered ...
I've tried to install these 10 times but the result was always the same
OS X 10.9.5 (13F34)
MacBook Pro 8.2
MacBook Pro, OS X Mavericks (10.9.5), OS X 10.9.5 (13F34) MacBook Pro 8.2