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efi boot

  1. pizzabox

    No Apple Hardware Test on 2012 MBP?

    I am trying to run Apple Hardware Test. When I try to boot into it I get sent to internet recovery, then after a while I get an error on a black screen: Error message: Cannot Load "EFI/DRIVERS/TESTSUPPORT.EFI This thread on the Apple forum suggests it's broken now for older systems. I did...
  2. S

    MP 1,1-5,1 Sapphire Radeon HD 7950 3GB EFI FLASH NO BOOT LOGO

    Saphire radeon HD7950 3GB has flashed successfully not getting boot loading of os ,gpuz shows EFI ,the bois rom was attached ,the show the full version number of card 7xxx .
  3. I

    iMac (Retina 4K, 21.5-inch, 2017)

    Good morning all, Has anyone tried using one of these https://ghostlyhaks.com/shop/product/efidl before, or does anyone know if it'd work on an A1418 EMC 3069?
  4. Fan1s

    MBP9,2 ROM224.0.0.0 Downgrade help

    Hi guys, I am a newbie on this forum, but I am a user of macbook for many years. I have home one Macbook Pro mid2012, i5 2,5Ghz. I was changing a motherboard, but it lost my serial number. I have it form bottom of mac. When I look at "about my mac" the field for serial number is empty. I can...
  5. M

    Problems with EFI Boot

    I have installed Windows 10 on my Mac Pro 4.1 (upgraded to 5.1) in EFI mode, so that I have AHCI enabled. Windows runs fine, but I have one problem: I can boot into Windows when I press the ALT-key and select EFI boot, but when I try to boot into Windows with the startup disk selector, I get the...
  6. Stephan1337

    OSX First Partition visible and not EFI after Cloning with OSX Installer tool

    Hi, I just tried to move my whole main drive partition (It was just 1 "usable" that I was aware of, with Mac OSX High Sierra) to a new Samsung EVO 850 1TB Harddrive. I had to initialise it and convert it to "GPT"-format with my Windows 10 Desktop, because the installer tool from High Sierra...
  7. d3vCr0w

    Will any of these Graphic Cards work with a Mac Pro 1.1 ?

    Hi people, thsis is my first post in the forum, I hope I get some help, thanks in advance. I recently got a first generation Mac Pro and I'm looking forward to upgrade the Graphics Card in order to be able to at least install Mavericks or Yosemite on it, since most software I need is not...
  8. Bmxlee

    Can't boot SFOTT drive

    I have a Mac Pro 2.1 2x 3ghz quad-core intel Xeon processor, 32GB 667mhz ddr2 FB-DIMM ram. Running 10.7.5 (lion) I've created a SFOTT drive on various different USB sticks and internal drives with different versions of Yosemite. Originally it would boot to a black screen with the apple logo...
  9. tkmj75

    Boot drive selection screen slow/unresponsive in Macbook Pro (Early 2015)

    I have a Macbook Pro Retina 13" (Early 2015) model and a bootcamp partition with Windows 10 installed in it. The dual boot to macOS and Windows was working just fine until about two month ago. I was switching operating systems using the alt/option key at bootup through the Bootup drive selection...
  10. serrano071

    Mac Pro 4.1 with Nvidia GTX 660 not flashed and want to update software from 4.1 to 5.1

    Hi, I have a Mac Pro 4.1 early 2009 with a Graphic Card Nvidia GTX 660 2GB not flashed, so I don´t see the boot screen and I don´t have the original card. My question is, I have the 4.1 software and I want to update to 5.1 software, can I do without the original card? Mac Pro 4.1 (early 2009)...
  11. basilt

    Pro 1.1 EFI vs FCP7 vs FCPX and BMD card

    hello, i just bought a used mac pro 1.1 Xeon 2.66ghz with 8GB ram and video card supplied by apple (geforce 7300). OSX Lion 10.7 I know it has EFI 32 bit that can be upgraded to 64bit. I admit i still cannot understand what the 32b vs 64b boot can offer though. I have also a PPC G5 2Ghz with...
  12. SeanLMH

    How to install OSX El Capitan on a Mac running Windows

    Okay, so my relative wanted to wipe an old Macbook Pro so that my Dad could use it, but said relative forgot to reinstall the OS. So, after much frustration, I have managed to get Windows running on the Macbook Pro (since I had an Installation Disk sitting around, I had to delete all the...
  13. I

    How can I create Windows install media that boots & installs UEFI ONLY?

    I'm trying to install Windows 8.1 in UEFI mode on my Mac Pro 4,1 flashed to 5,1 with 3.46GHz Intel W3690. As far as I can tell, Windows will only create media that boots the way the box that creates the media is booted. If the box booted via BIOS/CSM, the media it creates will (only) install...
  14. P

    Windows 7/8.1/10 EFI boot nvidia geforce 320m

    Hello guys I know this has been extensively discussed previously, in this thread (https://forums.macrumors.com/threads/win7-x64-booting-natively-via-efi-no-bios-emulation.696523/) although after reading 43 pages of posts, I still am unable to get any of the windows operating system working...
  15. bmac89

    Bootcamp Windows 10 from External Drive?

    hello, I am wondering whether it is possible to install and boot windows 10 preview from an external hard drive? The external hard drive is running Yosemite. You can boot OSX from an external so I though maybe bootcamp might work too. However from my attempts it seems an internal drive...