Hey everyone, I am brand new to the forum! I currently use a 13" MBP (2011) with 2.4ghz i5, 4GB RAM, 500GB HDD and running Yosemite. I am worried this will not be enough for both iOS and Android development as well as the business needs I have. The laptop needs to perform consistently without quitting, I will be using it as my business lifeline. I am looking to possibly upgrade if need-be, I prefer 13" to 15" and am looking at the 13" MBP Retina Display, 8GB RAM, 256GB SSD. I am wondering if the upgrade is advisable or necessary from anyones experience. I use external displays so do not need the increased screen space on my laptop. Any help is great!