Tired of the limitations of existing utilities for working with UEFI images (well, struck by NIH syndrome at the very heart), I wrote an open-source cross-platform utility - UEFITool. Traditionally, everything you read here is written for educational purposes, the author is not responsible for the possible damage to your equipment, lost profits, loss of time and faith in humanity, you use the provided software at your own risk and so on. Of course, you can also sing songs to the madness of the brave, but don’t tell me later that I didn’t warn. įurther in the text, I believe that you have a programmer, the ability to recover from a firmware failure, and a willingness to experiment. I advise fans of etching a couple of boards to pay attention to this project, and admirers of all-in-one devices - to this one. My version of a cheap and fast SPI programmer is described here. That is why I ask that before any experiments with firmware can be started, using a hardware SPI programmer, a complete dump of the contents of the microcircuit is made, otherwise recovery from unsuccessful firmware (and it will happen sooner or later) will be long, expensive and painful.Īn SPI programmer can currently be assembled at home from anything from a pair of resistors and capacitors ( SPIPGM ) to an Arduino or Raspberry Pi. Firmware for modified images is a double lottery. UEFI BIOS firmware on modern motherboards, despite the presence of various technologies like USB BIOS Flashback, Dual BIOS, Flash Recovery, etc. In the first part of this article I will describe the work with the tool I wrote for modifying UEFI images, and the second will be devoted to the modifications themselves. In my previous articles about UEFI, I planned to describe various useful modifications that help to overcome some of the limitations laid down by manufacturers, but then they did not reach their hands, but now is the time. Of course, in the absence of source code, making some changes is quite difficult, but you can do a lot without it. At the same time, the support of previous generations quickly disappears, and their users have no choice but to take this support into their own hands. Ensure the file contains the following lines.Hiding behind semi-mythical “security” and “protecting the simple user from bootkits”, UEFI manufacturers are tightening their screws with each new generation of their products. To get the modified UEFI BIOS to work, use a text editor to open the VMX file. Save the modified ROM with the name efi64_apfs.rom to your VM directory. Go back to UEFITool, right-click the selected item and choose Insert After, then select apfs.ffs from the FFS directory. Open your command prompt, change directory to that place and run this command: GenMod apfs.efi. Leave this screen for now.Įxtract the FFS tool to the same directory as the APFS driver file. Type in 961578FE-B6B7-44C3-AF35-6BC705CD2B1F and double click the result inside Message section. Use UEFITool to open EFI64.rom located at /圆4/, select File > Search and choose GUID tab. If that ROM doesn’t work for you, go after these steps to get a modified BIOS with APFS support. To simplify things, you can download my (/assets/img/-post/efi64_) (tested on VMware Workstation Pro 14, may work for other versions too). They are listed below:įFS to convert the APFS driver to UEFI module We’ll need 3 things before modifying the VMware UEFI BIOS. We can then slip the driver to the UEFI BIOS that bundles with VMware Player itself and everything should work. To solve the problem, we need to let the VMware UEFI know APFS and luckily the APFS driver can be extracted from the High Sierra installer as a UEFI driver executable. with VMware, you may have trouble getting the new OS to work as the upgrade forces conversion of the boot partition to APFS which the VMware UEFI does not support. If you happen to be using macOS in a virtualized way, e.g. Using Apple File System (APFS) with your virtualized MacĪpple has just released the macOS High Sierra with new features, one of them is the brand-new Apple File System (APFS) that is optimized for flash storage which newer Macs enjoy. I don’t take credit for the content of this at all, the developer deserves all credit for his ingenuity, but I am reposting this as it is incredibly useful, and the current blog has gone off-line due to a database issue. First off, this is a verbatim copy of a blog post written here ( ) and a cached content version here
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