This struggle is best summarised as an inverse problem, in which one begins with a set of observations (e.g., EEG signals) and has to work backwards to try to calculate what caused them (e.g., neural activity in a specific brain region).
Application Loader is a tool provided by Apple which allows you to upload new binaries and deliver new in-app purchases to iTunes Connect. You can download and install Application loader from iTunes Connect. Installing Application Loader . Log in to iTunes Connect. Click on Resources and Help. Scroll to App Preparation and Delivery. Click the Download Application Loader link to download the self-extracting installation package (ApplicationLoader_X.X.dmg).
OS X can be updated using the Mac App Store. Until OS X Mountain Lion, the updating method was to use the Apple Software Update. Software Update is a software tool by Apple Inc. that installs the latest version of Apple software on computers running OS X. It was originally introduced to Mac users in Mac OS 9.