how can i get iPhoto pictures back after factory reset on MacBook Pro I have done a factory reset on my MacBook Pro because it was slow. Now i have lost my pictures on iPhoto. The pictures were not backed up on iCloud. 
How can i get iPhoto pictures back?
If we assume that you do not have a Time Machine backup, you cannot. If you can enter Time Machine, you may be able to restore your iPhoto library in ~/Pictures/iPhoto Library.