Boot your Mac If you want to use your USB stick with an Apple Mac, you will need to restart or power-on the Mac with the USB stick inserted while the Option/alt () key is pressed. To boot from the disk, you need to hold down the option key when you hear the boot chime. Now remove the USB drive and insert it into the Mac computer.If you find Windows Media Creation Tool not enough space on C. The tool works with OS X installers that have been downloaded from the Mac App Store, but if you want to use the flash drive on a Hackintosh machine. Flash Drive Maker helps you make your own bootable USB drives via the command line without having to look for the correct commands, manually setting the path to the source installers, and so on. The original EFI specification remains owned by Intel, which exclusively provides licenses for EFI-based products, but the UEFI specification is owned by the UEFI Forum.Tiano has since then been superseded by EDK and EDK2 and is now maintained by the TianoCore community. The first open source UEFI implementation, Tiano, was released by Intel in 2004. It added network authentication and the user interface architecture ('Human Interface Infrastructure' in UEFI).The latest UEFI specification, version 2.9, was published in March 2021. It added cryptography and security.Version 2.1 of the UEFI specification was released on 7 January 2007.SBBR requires UEFI, ACPI and SMBIOS compliance. The program requires the system firmware to be Server Base Boot Requirements (SBBR) compliant. In October 2018, Arm announced Arm ServerReady, a compliance certification program for landing the generic off-the-shelf operating systems and hypervisors on Arm-based servers. The project promotes the idea of Firmware as a Service.
![]() ![]() Bootable Drive Maker App Mac If YouUEFI firmware provides several technical advantages over a traditional BIOS system: Many Linux and BSD distros can support both recipes.The interface defined by the EFI specification includes data tables that contain platform information, and boot and runtime services that are available to the OS loader and OS. Arm SystemReady defined the Base Boot Requirements ( BBR) specification that currently provides three recipes, two of which are related to UEFI: 1) SBBR: which requires UEFI, ACPI and SMBIOS compliance suitable for the enterprise level operating environment such as Windows, Red Hat Enterprise Linux, VMware ESXi and 2) EBBR: which requires compliance to a set of UEFI interfaces as defined in the Embedded Base Boot Requirements ( EBBR) suitable for the embedded environment such as Yocto. The new program name is Arm SystemReady. Only little-endian processors can be supported. 32-bit (for example IA-32, ARM32) or 64-bit (for example x64, AArch64) pre-OS environmentCompatibility Processor compatibility As of version 2.5, processor bindings exist for Itanium, x86, x86-64, ARM (AArch32) and ARM64 (AArch64). Flexible pre-OS environment, including network capability, GUI, multi language In comparison, the processor mode in a UEFI environment can be either 32-bit ( x86-32, AArch32) or 64-bit ( x86-64, Itanium, and AArch64). Standard PC BIOS is limited to a 16-bit processor mode and 1 MB of addressable memory space, resulting from the design based on the IBM 5150 that used a 16-bit Intel 8088 processor. As of UEFI 2.7, RISC-V processor bindings have been officially established for 32-, 64- and 128-bit modes. Similar projects exist for MIPS and RISC-V. : sections 2.3.2 and 2.3.4 As of version 3.15, the Linux kernel supports 64-bit kernels to be booted on 32-bit UEFI firmware implementations running on x86-64 CPUs, with UEFI handover support from a UEFI boot loader as the requirement. At this point, the kernel can change processor modes if it desires, but this bars usage of the runtime services (unless the kernel switches back again). After the system transitions from "Boot Services" to "Runtime Services", the operating system kernel takes over. UEFI requires the firmware and operating system loader (or kernel) to be size-matched for example, a 64-bit UEFI firmware implementation can load only a 64-bit operating system (OS) boot loader or kernel (unless the CSM-based Legacy boot is used). As GPT incorporates the protective MBR, a BIOS-based computer can boot from a GPT disk using a GPT-aware boot loader stored in the protective MBR's bootstrap code area. Such a setup is usually referred to as BIOS-GPT. This option allows Linux to recognize and use GPT disks after the system firmware passes control over the system to Linux.For reverse compatibility, Linux can use GPT disks in BIOS-based systems for both data storage and booting, as both GRUB 2 and Linux are GPT-aware. Disk device compatibility Support for GPT in Linux is enabled by turning on the option CONFIG_EFI_PARTITION (EFI GUID Partition Support) during kernel configuration. Cpt file viewer for macSuch a setup is usually referred to as UEFI-GPT, while ESP is recommended to be at least 512 MB in size and formatted with a FAT32 filesystem for maximum compatibility. Booting Linux from GPT disks on UEFI systems involves creation of an EFI system partition (ESP), which contains UEFI applications such as bootloaders, operating system kernels, and utility software. UEFI systems can access GPT disks and boot directly from them, which allows Linux to use UEFI boot methods. This partition is not required if the system is UEFI-based because no embedding of the second-stage code is needed in that case. From GRUB's perspective, no such partition type exists in case of MBR partitioning. Commonly 1 MB in size, this partition's Globally Unique Identifier (GUID) in GPT scheme is 21686148-6449-6E6F-744E-656564454649 and is used by GRUB only in BIOS-GPT setups. Some UEFI variables are shared between platform firmware and operating systems. UEFI Memory map services SMM services ACPI services SMBIOS services Variable services UEFI variables provide a way to store data, in particular non-volatile data. The operating system is permitted to directly write to the framebuffer provided by GOP during runtime mode. Runtime services are still accessible while the operating system is running they include services such as date, time and NVRAM access.Graphics Output Protocol (GOP) services The Graphics Output Protocol (GOP) provides runtime services see also Graphics features section below. Boot services are available only while the firmware owns the platform (i.e., before the ExitBootServices() call), and they include text and graphical consoles on various devices, and bus, block and file services. In that case, booting Linux on UEFI systems is the same as on legacy BIOS-based systems.The 64-bit versions of Windows Vista SP1 and later can boot from a GPT disk which is larger than 2 TB.EFI defines two types of services: boot services and runtime services. Time services UEFI provides time services. For example, UEFI variables can be used to keep crash messages in NVRAM after a crash for the operating system to retrieve after a reboot.
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