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22

You can recreate the EFI System Partition (ESP) using the command-line gpt tool. It should start at sector 40, and it should be 409600 sectors (exactly 200MiB) long. The GPT entry's type should be C12A7328-F81F-11D2-BA4B-00A0C93EC93B, and if you have a hybrid MBR, the type there should be EE. The format is actually a subset of FAT, not HFS+. You can read the ...


7

Yes, you can install a shell. You can also setup a firmware password, though you generally use utilities that run under Mac OS X to set it up (Apple include's Firmware Password Utility on the install DVD, but does not actually lay it down on the system partition). EFI is probably less interesting from an hobbyist perspective than OpenFirmware was. Even if ...


5

I finally managed to successfully downgrade the EFI firmware to version 1.6. Unfortunately that didn't make my hard drive work. However I'm going to reproduce my steps here so that the whole world can know what it takes: Download the EFI firmware update package from Apple. Here is the link I used for firmware version 1.6 for my Macbook Pro: http://support....


5

First install rEFInd, and boot Ubuntu installer after. Enable "Boot after power failure" by adding next line to /etc/rc.local: setpci -s 0:1f.0 0xa4.b=0 setpci -s 00:03.0 0x7b.b=0x19 Install mac fan control: sudo add-apt-repository ppa:mactel-support/ppa sudo apt-get update sudo apt-get install -y macfanctld applesmc-dkms For SSD tunning (you have ...


5

Alright, I see you've added some requisites to your answer. Here goes. Part 1: Install Ubuntu 16.04 Server. Download this. (Ubuntu Server 16.04 32-bit) This is done the same way any other Linux install is done. You will insert the CD/DVD, run through the setup to take the entire partition of the Mac Mini, and once you reach a desktop, you're ready for ...


4

So you can image the drive and get things set up while your new drive is in an enclosure and only swap it into your Mac as an internal drive once it is tested and ready to go. Also, not having to code special exceptions when to and when not to write an EFI partition is sound engineering practice. You can't write buggy code if you don't write any code.


4

If you install Windows with the Bootcamp Assistant from a standard Mac OS X system, Windows always will start from a PMBR/Hybrid MBR partition table embedded in the GUID partition table (Legacy MBR). MBR takes precedence in hybrid configuration even if a EFI boot might be possible. If you use a non-Bootcamp Assistant EFI install method for Windows (e.g ...


3

If you can successfully start your Mac from a Mac OS X DVD take a look at this: http://pubmem.wordpress.com/2011/04/09/flash-efi-firmware-update-manually-on-a-macbook-51/, especially comment 54 and follow-ups. It explains how to manually flash the EFI firmware: Download the EFI Firmware update from Apple. This link lists EFI and SMC firmware updates. You ...


3

Yup, apparently it is missing and you have to install EDK to get it.


3

EFI is a contract that specifies how the hardware can find and start the software and vice versa. Rather than have to build custom code into each new hardware device and each new software release - a standard was agreed upon and the specification was initially written by Intel. Then a company like Apple decides to adopt a certain version of the EFI ...


3

The ESP is normally used for the boot loader on ‘normal’ EFI systems, however on a Mac the ESP is not—it is usually empty, but has been used as a staging area for firmware updates. A Mac will initially look in the ESP for anything to boot from, but if it is empty or non-existant, it will look for the root file system to boot from.


3

The content type of the second partition is wrong. Instead of FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF it has to be 53746F72-6167-11AA-AA11-00306543ECAC. To edit the content type you have to boot to Internet Recovery Mode and use gpt. Additionally the fourth partition will be removed (probably the "deleted" partition). Please check that it doesn't contain any ...


3

First check your current Firmware and SMC version About your Mac -> More -> System Report. Check the Boot ROM and the SMC version. It should look similar to this: The latest Boot ROM version for your MacBookPro8,1 (Early 2011) is MBP81.0047.B2A and the latest SMC version 1.69f4 (SMC 1.7). If you get the same versions the latest EFI updates are already ...


2

Removed vertex2 SSD - Mac booted. Looks like the SSD has failed, because if I install the SSD to other SATA slot, the MacBook does not boot, either. Also, this drive is invisible with external SATA to USB adapter. It's Good to have a backup solution.


2

If you are still looking for an answer I found one on Stack Overflow: http://stackoverflow.com/questions/777437/sopen-s-firmware-console-on-mac-osx-intel It does not seem possible to do this. The only thing you can install to get some kind of EFI boot menu options menu is rEFIt, which can be found here: http://refit.sourceforge.net I know it isn't ...


2

Delete the EFI partition, do your secure erase, then don't partition or format the drive from Windows 7. Instead, boot from the OSX installer disk or recovery environment, and use its version of Disk Utility to partition the drive, using the GUID partition scheme. Disk Utility will create the EFI partition for you if done this way. To be clear: the EFI ...


2

Try this: Back up drive on time machine. Restart, rebooting on Lion install disk. Go to Disk Utility. Erase Partition. Erase HD. Re-erase partition again, this time giving it a name. Click on HD. Verify HD to confirm EFI error message no longer appears. Go back to install screen. Choose restore from back up.


2

It seems that some early 2011 15" Macbook Pro (8,2) machines have trouble creating a Fusion Drive. It's being discussed in this MacRumors forum thread: http://forums.macrumors.com/showthread.php?t=1480179&page=16. This is the post that gives more datailed information about the problem http://forums.macrumors.com/showpost.php?p=16321849&postcount=...


2

You could try installing rEFIt, which will give you a boot menu every time you boot up. http://refit.sourceforge.net


2

The default results of diskutil list on a clean Lion installation should be as follows: mac:~ me$ diskutil list /dev/disk0 #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *500.1 GB disk0 1: EFI 209.7 MB disk0s1 2: ...


2

Expanding on sschuberth's answer, as of December 2013, the Samsung 840 EVO (but not PRO) also has firmware that directly supports TCG OPAL. It's a good bet that an 840 Pro firmware update to do the same thing will come soon. You need some software to manage the SED drive, otherwise you get little or no benefit from the built-in security. WinMagic ...


2

I've asked myself exactly the same thing as I've also bough a Samsung 840 Pro for my MacBook Pro. After some research I've found this post indicating that the 840 Pro's hardware encryption requires TPM support, and that's only found in PC BIOSes, not in Mac's (U)EFI. To be sure, I've asked Samsung support which of the standards "ATA-Security", "Seagate ...


2

I found a post on the subject from the guy who wrote this book about Mac OS X internals. His post mentions Snow Leopard (10.6), but the issues would be similar for 10.7. See Mac OS X Internals - Is Your Machine Good Enough for Snow Leopard K64? Here's the part I found most relevant to your question: [...] Unfortunately, a 64-bit processor alone doesn’t ...


2

EFI firmware updates are 'staged' in the normally hidden EFI partition on your disk, which typically resides at device /dev/disk0s1. Once in single-user mode, you can create a folder in which to mount this partition, then mount it like so: mkdir /Volumes/efi mount -t msdos /dev/disk0s1 /Volumes/efi From here, navigate into the /EFI/APPLE/FIRMWARE/ sub-...


2

I can confirm that if Win8 is installed from an ISO (rather than a Win7 upgrade) then it will be installed on a boot-using-EFI partition.


2

They are hidden partitions in OS X. Showing all partitions in Disk Utility also shows the partitions in the list: …and diskutil list: 1: EFI EFI 209.7 MB disk0s1 2: Apple_HFS Mac SSD 150.0 GB disk0s2 3: Apple_Boot Recovery HD 650.0 MB disk0s3 They are usually not mounted by default and therefore not shown on the desktop ...


2

I can verify that this procedure does indeed reset SMC. It will give a warning-message, but this is unrelated. Fans, charging and everything else goes back to normal, as with a keyboard-triggered SMC-reset.


2

If your EFI is not working, you will need to restore it. Download from here for your model. Then follow the procedure described here.


2

Your Dilemma I'm in full sympathy with your wish "save on battery and reduce heat, without paying the noise cost" of using the discrete graphics card inside a MacBook Pro. Warning Before you do anything which will disable your display, please make sure you are able to log in to your MacBook Pro using SSH so that you can undo, your handiwork. While screen ...


2

The average user cannot validate firmware and even exceptional users are having difficulty performing the level of analysis required. Average users struggle with the difference between authentication and authorization. Expert users find it tedious to verify checksums and cryptographic chains of trust and human nature is we don't do those activities well, ...



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