My black apple Mac OS 10.92 can only be booted with a four-leaf clover on a USB flash drive. Now the hard disk mode is MBR, I don't want to.

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A single hard disk system in the form of four-leaf clover +GPT, especially a notebook or a common desktop, often can't be turned off from the USB flash drive after the dual system of Mac+Windows is successfully installed, or the installation problem of the four-leaf clover boot setting can't be started correctly through the local hard disk. The common problem is that the display: boot0af: error or boot0ss: error cannot be started from the main hard disk and fails.

I remember that 1-2 years ago was the era of chameleon +MBR, and this problem was not very prominent. The win7+ ML 10.8.X dual system with single hard disk is mainly to install win chameleon and Wowpc software under Windows, and select chameleon to boot after starting under Windows. With the installation and startup of the four-leaf clover +GPT dual system, it is more and more loved and respected by computer enthusiasts, including the maturity and support of UEFI BIOS. The partition mode of four-leaf clover +GPT dual system installation has been adopted by more and more fruit lines. This is entirely the result of scientific and technological progress and development. Undoubtedly, of course, it is the super function of the four-leaf clover to guide and install, forcing many people, including the elderly, to change from the "chameleon +MBR" mode to the four-leaf clover +GPT mode. .......

Back to the topic of this article, it seems that booting a single hard disk is not very important. Except for notebooks, most desktops are dual-disk, that is, SSD solid-state hard disk+ordinary hard disk configuration. The system boot problem is easy to solve. Even in full GPT or MBR+GPT, there are many ways to boot the system. In addition, there are so many tutorials in the forum ... many posts have been grabbed for this "single hard disk" problem. But most of them focus on how to install, and there are different explanations and methods for booting. The details are not clear, they are all based on their respective models or motherboards. "Takeaway" basically doesn't work, because it also involves the installation version, the type and setting of the motherboard BIOS, etc ... Facing the "black" Apple system that is more and more "easy" to install, how to "perfect" boot is the same as perfect installation. Especially the four-leaf clover boot, in addition to installation, it seems that it is actually more important to boot and configure the system correctly. A relatively complete and comprehensive tutorial is "Meta Edition":

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The problem of single hard disk boot refers to the clover boot mode of ordinary hard disk. Because SSD solid-state hard disk uses semiconductor storage technology physically, the startup mechanism is completely different from that of ordinary hard disk, so if a single hard disk is SSD, the following methods can be ignored (the old man has practiced it in his notebook, and the system disk is normally installed with "boot0af", so it can be directly started without adding EFI system installation). The old man has been studying how to solve the boot of a single ordinary hard disk recently, and finally has a "breakthrough" successful result. Mainly for non-UEFI and UEFI startup support motherboard installation settings in Clover, the details of single hard disk startup installation need to be roughly introduced and explained as follows:

Description of hardware environment conditions: non-UEFI or BIOS motherboards with UEFI startup support should be set according to the traditional BIOS method. After all, it is not pure UEFI, which may include notebooks of all brand machines and ordinary "miscellaneous" computers, but it can be ignored for motherboards of pure UEFI such as ASUS, Gigabyte, MSI and Huaqing. There are already many tutorials on the forum on the installation method of dual system or single system, so I won't discuss them here. Although some motherboard BIOS has UEFI support option, it can only be used to install Windows, and Clover boot to install Mac system is not universal, and some lines are not. For example, some original Intel motherboards also have UEFI startup support, but even if they are converted into Clover+GPT, they can only boot Win8, but can't boot Mac into the system, which is completely related to BIOS compilation, so they can only be installed and set through traditional BIOS. I successfully booted my Lenovo W530 notebook and another ordinary desktop in the same way, completely getting rid of relying on USB flash drive to boot. The specific method is as follows:

A, preparation and installation instructions:

1.BIOS setting: cancel the startup support of UEFI and restore the default startup mode of traditional BIOS, but the USB option in BIOS should enable UEFI support (if this option is available, Win8 can be directly booted and installed with a U disk). It goes without saying that "AHCI" and "ACPI”SATA hard disks and native power management functions in BIOS should be turned on in order to facilitate the smooth installation of dual systems. But by the way, cancel the UEFI startup option, install a genuine USB flash drive to start, and you can also install the Mac system normally (the default USB flash drive should be selected as the first startup disk for both Mac and Win8 installations).

2. The new version of 2.Clover supports it. The pkg installation file of MBR+GPT, I used version 2428; EFI Tools Clover tool software used to mount EFI partition on MAC system must use the same version for Clover system boot installation or EFI boot partition installation, otherwise a "blue screen" will appear in the Clover boot interface.

3. EFI partition in 3.GPT format must be formatted as FAT32 format, which is more than 200M in Win or Mac system. The installation sequence is generally to install WIN8 first, and then create a partition (in RAW format) for installing MAC system under WIN system. I set the EFI partition to 220M when I installed WIN8. Use the "Shift+F 10" command in sequence: first set EFI (ESP for WIN) partition, MSR default partition, and then create the main partition! Otherwise, even if the order of EFI and MSR is different, it will not affect the Windows installation, but Clover will fail to successfully install the EFI boot file under the MAC system because of the wrong default order of EFI partition, remember!

4. It doesn't matter whether a single hard disk is installed with Win or Mac first. The W530 laptop shown below is in a "normal" state. When installing a desktop in the office, the existing Mac system is used to partition the hard disk of GPT, but the partition of Win system to be installed is first divided into a "large area", and the disk is formatted as MS-DOS(FAT), that is, FAT32 format. When installing Windows, use the command "shift+F 10" to separate EFI, MSR and system partition in sequence.

5. Either way, for the EFI partition, before Clover installation, copy the original EFI folder (if any) to the desktop, format the FAT32 format once with the tool software, and restart the computer. This is similar to the production of installing a USB flash drive, which is very important to ensure the successful installation of clover EFI system partition!

6. Clover boot installs USB2.0, which can boot the installed system and facilitate the boot and setup of dual systems. Of course, if the setting is successful, you can completely get rid of the main hard disk, which is a bit nonsense. .....

2.Clover installed EFI system partition, as shown in the figure below:

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The above picture shows Clover's settings for W530 notebook and ordinary desktop respectively, which are basically the same. But be sure to check "Install Clover to EFI system area" and prompt "Installation successful"! If the installation is unsuccessful, you need to find out the reason or change other related settings, otherwise you can't start from EFI partition; Some tutorials are old, and it is ineffective to try to copy them. Clover EFI can successfully boot a single hard disk only after successful installation. After successful startup, the interface will display "b 1f: init6" or "6" for about 1-2 seconds.

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According to the actual verification, Clover's selection reference diagram of BootLoader requires selecting "boot0ss" to boot by EFI system partition; "boot0af" is more about the boot selection of the existing active partition of MBR, which is widely used in dual-disk systems, such as GPT+MBR. According to the successful case, the boot can be successfully started without checking the option "Install Clover to EFI system area". Therefore, in most cases, the dual-disk system need not worry about the startup problem, as shown in the following figure:

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3. After successfully installing the partition startup item of EFI system, check the related settings of dual system startup:

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Under the Mac system, use ShowAllFiles software to open all hidden files for inspection. What is the difference between the distribution of "boot" series startup files under EFI system partition and MAC system partition? Please refer to the contents shown in the figure below. Obviously, the installation of the "boot" series files under the default system partition was assigned to the EFI partition, but there was only one boot file under the system partition. ......

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As shown in the above figure, check the contents of the EFI folder in the EFI partition. In addition to the Microsoft folder used to boot Win8 system, the BootX64.efi boot file in the boot folder is a key file generated by installation, and it is not added by copying. In the previous old experiment, the method of copying and adding had no effect at all, which is also the requirement of emphasizing the successful installation. ......

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The above picture shows the partition diagram of W530 notebook's single hard disk GPT for reference only ... The following screenshot shows the "allocation" diagram of the startup folder under the EFI system partition of another single hard disk ordinary desktop, which is somewhat different from the above notebook. I added the clover folder later, which may not be necessary. ......

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The only difference is that the "boot" series files after Clover's successful installation are installed in the root directory of the Mac system disk, and whether the EFI partition is hidden remains to be verified ... Attached is a boot diagram of the single hard disk clover boot interface of W530 notebook, which replaces Lenovo's boot theme.

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The above methods are not necessarily unique, but a summary of the actual operation of the elderly in accordance with the conventional methods and order. Whether the method is right or not, at least the boot problem of single hard disk clover is solved. If there is a better way, welcome to discuss with * * *. Have a nice weekend!