efi boot

Hi guys, I'm trying to install High Sierra on my 2011 Macbook. I've made a bootable USB drive but when I restart (power + option) I only get a 'EFI Boot' drive as an option. If I click it, it goes into a black screen with code then to the Apple loading screen but it is stuck there. Ps. Not sure...

I found my 2009 Mac mini in a box and thought I'd experiment with it. I used Opencore Legacy Patcher to install Monterrey and it worked. However, Wifi didn't work as expected and I also had some graphic issues. So I thought that I'd best revert to stock. I fetched a El Capitan bootable USB...

I did something wrong when updating Martin Lo's OpenCore package to 0.7.5 today. Now I no longer see the Windows folder in the EFI partition, and OpenCore no longer offers my Windows drive as a boot option. Do I need to reinstall Windows, or is there a simpler way to recreate the Windows files...

My Mac Pro 2008 always freezes when I click EFI Boot on the bootloader screen. I want to install Windows 10, but I am having trouble booting my Windows media. When I try to boot with a Windows 10 DVD disc, the boot loader screen shows "Windows" and "EFI Boot" will be displayed. I click on...

I'm recycling some donated computers that Goodwill here resells. Of course these have reached the end of their lifecycle so they usually only support snow leopard. The next step is trying a more recent OS. My first step was to use the standard method to create a USB that would install LION...

I was Flashed XFX Double D R9 280X for MacPro with Netkas Script ,am getting boot screen on Lion OS ,but not working on High seira or Mojave ,shows boot screen and shutdown at the middle ,not booting with Windows 10 also ,it has no bios switch .Regarding the old post load balancing ,soldered...

Hi! At start I'm very sorry for my English. It's not my mother tounge. I'm quite new in this. All I wanted is cheap Mac device that is quite powerfull so I bought 2009 Mac Pro with HD 5870. All I did was to change graphics card so I bought RX 470 and Installed it. Beacuse I wanted to play some...

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...

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 .

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?

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...

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...

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...

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...

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...

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...

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)...

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...

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...

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...