Upgrades also create large temporary files, also written to storage, that contain copies of the individual components of the to-be-upgraded OS. Typically, OS upgrades require more space to install than they eventually occupy, thanks to their need to unpack compressed files - much too large to hold in memory - before beginning the process. IOS 9 includes several space-saving features to make sure customers with a small amount of storage - like a 16GB iPhone 6 - will be able to install the upgrade, including a just-revealed option to automatically delete apps.Įarlier this month, Apple said that it had reduced the amount of free space required to install iOS 9, from the 4.6GB for last year's upgrade to 1.8GB this fall, when the new operating system releases. Some had to laboriously remove apps or purge photo and music collections to free up enough room for iOS 8.
The new feature, revealed yesterday by several users of the iOS 9 preview now in developers' hands, was another piece in a plan by Apple to avoid repeating the debacle of last year, when owners of iPhones and iPads with small storage allotments were unable to easily install iOS 8.
Apple's iOS 9 will ask users if they want to delete apps to make room for the upgrade if their devices are short of space, then automatically select those marked for temporary elimination, according to online reports.
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