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Linux dual-booting is achieved by partitioning the boot drive, installing the Yaboot bootloader onto the Linux partition, and selecting that Linux partition as the Startup Disk. This results in users being prompted to select whether they want to boot into Mac OS or Linux when the machine starts.
For a cold boot, for example, it may need to execute all of its functionality. If, however, the system supports power saving or quick boot methods, the BIOS may be able to circumvent the standard POST device discovery, and simply program the devices from a preloaded system device table.
Books, formerly iBooks, is an e-book reading and store app released in mid-2010, as part of the iOS 4 update. [5] Initially, iBooks was not pre-loaded onto iOS devices, but users could install it free of charge from the App Store. With the release of iOS 8, it became an integrated app.
For iPhones, iPads and Apple silicon-based Macs, the boot process starts by running the device's boot ROM. On iPhones and iPads with A9 or earlier A-series processors, the boot ROM loads the Low-Level Bootloader ( LLB ), which is the stage 1 bootloader and loads iBoot; on Macs and devices with A10 or later processors, the boot ROM loads iBoot.
On iPhone, iPad, Apple Watch, iPod Touch, and Apple TV devices, the boot ROM is called "SecureROM" [8] It is a stripped-down version of iBoot. It provides a Device Firmware Upgrade (DFU) mechanism, which can be activated using a special button combination.
The boot code in the VBR can assume that the BIOS has set up its data structures and interrupts and initialized the hardware. The code should not assume more than 32 KB of memory to be present for fail-safe operation; [1] if it needs more memory it should query INT 12h for it, since other pre-boot code (such as f.e. BIOS extension overlays, encryption systems, or remote bootstrap loaders) may ...
All Apple silicon-based Macs use a newer method separate from previous Macs where it uses a boot ROM located on the SoC to launch iBoot, in a similar manner to that of the iPhone and iPad. [ 2 ] An Apple PowerBook 180c displaying the Happy Mac during the startup process
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 ...