Roms won't load

[patsfanasg]

I'm new to Raspberry Pi and Retropie. I got my Pi 3 yesterday and installed Retropie correctly. It booted and I set up wifi. Today I installed some ROMS onto it. I scraped the images and attempted to boot up my first Atari 2600 Rom. I had downloaded the full library and when it launched the top half of my screen was blue, green, black, and gold. The bottom half was black. All the other games for 2600 are like that too. I assumed it was a ROM issue. But all my other games on NES, N64, Genesis, and PSX start to launch before going back to the game list screen. Any ideas?
EDIT: I just saw some games have two copies with one working. Most of the titles have ._ before them.

[mediamogul]

@patsfanasg

Most of the titles have ._ before them.

When you copy files over from a Mac it makes a duplicate junk file that begins with ._. You'll ultimately want to switch to a transfer program like Cyberduck to avoid the issue. You can get rid of the junk files that are currently there by dropping to the command line (F4) or using ssh and typing:

find /home/pi/RetroPie -name "._*" -exec rm -rf {} \;