My MacBook Pro don't let me install any program

Ruben Diaz S,

which model MacBook Pro do you have, and which version of OS X is installed on it?

Are you the only User?

Go to System Preferences / Users & Groups. Any others listed on the left side? (Guest User is ok.)

Ruben Diaz S,

you can try this: boot your MacBook Pro into Recovery mode by holding down a Command key and the R key as it starts up. Once the Mac OS X Utilities menu appears, select Disk Utility. On the left-hand side of the Disk Utility window, select your internal disk’s boot partition (typically called “Macintosh HD”). On the right-hand side, press the Verify Disk button if it’s not greyed out; if it is greyed out, or if it reports that errors were found, press the Repair Disk button. Once the verification/repair is completed, exit Disk Utility and select Restart from the Apple menu to restart in normal mode. Does it still prevent you from installing programs?

Ruben Diaz S,

you’re welcome. To repay your debt to me 😉, please purchase an external drive and use it as a Time Machine backup destination, so that you’ll always have an up-to-date working environment that’s only one restoration away.