5th Solid food: Organic Apple

i tried to give him fresh apple and scraped with spoon. but it's kinda sour and he doesn't seem to like it.  the scrapping didn't really work b/c the apple pieces still too big and he split it out afterword. so i tried Gerber apple baby food.  he is doing much better.  i guess maybe fresh food is too raw for him, so his tummy can't tolerate it?