In OS X, you must authenticate as an administrator before you can install apps from the Mac App Store. 07/16/2017 – by Mod_GuideK 0 In OS X, you must authenticate as an administrator before you can install apps from the Mac App Store. A. True B. False SHOW ANSWERSCorrect Answer: A Explanation/Reference: Download Printable PDF. VALID exam to help you PASS.