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The .ipsw file itself is a compressed archive file (renamed Zip archive) containing at least three Apple Disk Image files with one containing the root file system of the OS and two ram disks for restore and update. tvOS, audioOS and macOS also include a disk image for the recovery environment (recoveryOS).
Apple File System was announced at Apple's developers’ conference (WWDC) in June 2016 as a replacement for HFS+, which had been in use since 1998. [11] [12] APFS was released for 64-bit iOS devices on March 27, 2017, with the release of iOS 10.3, and for macOS devices on September 25, 2017, with the release of macOS 10.13.
It was the first version to use the UNIX-style POSIX permissions model and Unicode UTF-8 file name encodings. Version 3.0 supported a maximum share point and file size of two terabytes, the maximum file size and volume size for Mac OS X until version 10.2. [4] (Note that the maximum file size changed from version 2.2, described above.)
iOS devices can have a passcode that is used to unlock the device, make changes to system settings, and encrypt the device's contents. Until recently, these were typically four numerical digits long. However, since unlocking the devices with a fingerprint by using Touch ID has become more widespread, six-digit passcodes are now the default on ...
In September 2014, the iOS 8.0.1 update caused significant issues with Touch ID on iPhone 6 and cellular network connectivity on some models. Apple stated that affected users should reinstall the initial iOS 8 release until version 8.0.2 was ready. [68] [69] [70] iOS 8.0.2 was released one day after 8.0.1, with a fix for issues caused by the 8. ...
Files is a file management app developed by Apple Inc. for devices that run iOS 11 and later or iPadOS. [2] Discovered as a placeholder title in the App Store just prior to the company's 2017 Worldwide Developers Conference, the app was officially announced at the conference shortly thereafter.
A flash file system is a file system designed for storing files on flash memory–based storage devices. While flash file systems are closely related to file systems in general, they are optimized for the nature and characteristics of flash memory (such as to avoid write amplification ), and for use in particular operating systems .
In the case of iPod file managers, this takes place between an iPod and a computer or vice versa. iTunes is the official iPod managing software, but 3rd parties have created alternatives to work around restrictions in the program, or for those avoiding known issues with iTunes.