After the installer is created, boot into it and install your OS X. For best results, use a USB2.0 port directly on the motherboard. Use the flash drive (with clover installed) to boot the OS X hard drive. Install Clover onto the OS X hard drive, but instead of installing directly to the boot0af in MBR.
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On a hackintosh it’s possible to dual boot macOS and Windows on the same hard drive disk, which I will explain how to here. Although it’s recommended that macOS be installed on a separate drive than Windows, it’s perfectly possible to dual boot Windows and macOS on the same drive for those that don’t have multiple hard drives to spare.Dual-booting on separate hard drives is super easy you just install macOS on one drive and Windows on the other and then simply boot Windows as a temporary device or through the Clover menu. For those that want to install both macOS and windows on the same drive this guide to walk you through the steps. Hackintosh Dual-Boot GuideFor those of you not familiar with dual-booting or a macOS hackintoshing.
We will first need to format the drive as GUID using Disk Utility. Step 2: Make a macOS High Sierra HackintoshNow that we have access to macOS we will now create a flash drive installer containing macOS install files and then install macOS. Based on what CPU/Processor you are using following the full guide below and then return to this one once you have macOS running. Just os you know you will need to completely wipe the drive you are using in order to format as GUID using Disk Utility. Also after macOS keep the flash drive the way it is as you will need it later.
First disconnect other drives.Make your apfs drive with mac have only the container and the macos, so would be disk0, disk1, disk1s1.Macos installed as the sole OS on the ssd as apfs (only one drive connected at all) then i use disk utility to partition the device disk0Select the drive (disk0) and click partition then click the + on the bottom left area of the drop down menu.From there I just partition as exfat. Name it something you will remember, i leave mine “windows” and its fine with that name.Reboot to windows usb installer and install to the partition that yo made in mac, you definitely want to erase and reformat the partition before trying to install.After all goes well with install I reboot to bios and select your UEFIclover (the one you always used for hackintosh) to 1st boot option.Then you can boot macos or windows from clover.I dont know anything about opencore. I followed your instructions, but I do not have a “EFI/Microsoft/Boot/” option in clover configurator. I can boot into OSX (high sierra) only through the USB stick.
I think from other posts I’ve seen that I should not have formatted the windows partition ExFat, but left it unformatted, and that because of that windows 10 created a separate boot partition. Is there some other way to get the clover bootloader to take precedence over Windows bootloader? From the USB stick’s clover, I am able to boot both Windows and OSX. Thank you now i can dual boot windows and mac os with single hardisk.
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But for some steps I took quite different methods. First I install Windows 10 through USB using Rufus and formated as GPT. After that for make partition hardisk I use Minitool Partition Wizard to make partition hardisk can be read for OS X System. Then I install OS X El Capitan (Include Clover Bootloader) and use partition hardisk space that I have create before. And for making dual boot system, I try follow steps to rename bootmgwf.efi into bootmgwf-orig.efi ^^. I got stuck at section 4.7.
When I tried to install Windows 10, I got“windows setup could not create a new partition or locate an existing one”.I think it could not over-write the EFI partition created by MacOS or Clover. I googled the above error and the only solution is to run diskpart, select the drive and clean. Clean removes ALL partitions, including the MacOS.For Windows 10 to install on a GPT drive, it needs to create ESP (EFI), Recovery and Windows partitions.Has anyone else encountered this problem, please do share your solution?Thanks. I had the exact same problem. I think it is because the Win 10 installer is expecting an MBR partition table not a GPT one and the instructions in this blog are to format the drive as GUID, not MBR. Thus assuming we are running the Win 10 installer in the correct (GPT) mode then there is no solution.
I have experimented with creating the installation media differently with no positive results so far. I did not get the ‘next’ button greyed out as Hackintosher described, only the error message when I clicked on ‘next’. I tried getting Win 10 to install on empty space (deleted partition) and it seemed to recreate the partitions ok but on the install screen it was stuck at 0% copying files and then came up with an error message telling me to restart the install process, and back to the same problem above.
While Apple laptops are my gold standard for laptop design and usability, there is a special place in my heart for old-school Thinkpads that are built like tanks and ready to go to work wherever they are, especially with their full array of ports, removable components, and roll cages. This is a guide for turning a Lenovo Thinkpad T420 into an even more powerful multi-tool running both macOS and Windows 10.
Like most Thinkpads, my T420 came out of the box running Windows; Windows 7 to be specific. I took advantage of the free upgrade to Windows 10 and have not found any issues driver-wise so the guide will start from this assumption. Speaking of starting, there are a few more things you need before we begin.
Prerequisite
Let's get started.
1. Prepare the macOS installation USB
Since this is the only step we will need a Macintosh for, we will go ahead and do this first. Fire up your Apple computer of choice for the following steps.[1][2]
You can now put away the Apple computer and switch your attention over to the Thinkpad T420.
2. Upgrade to Windows 10 Creators Update
In case you haven't already given in to Windows Update's nags, you should first update to the Creators Update (Version 1703, Build 10.0.15063) or later. This version allows us to convert MBR booting Windows 10 into an UEFI booting version quickly.[3]
3. Upgrade BIOS for Wi-Fi card
For reasons unknown, Lenovo has decided to block the use of any Wi-Fi card outside of their official cards. Thus, we will have to install a modified BIOS to whitelist unsupported cards.[4]
The version of the BIOS I have above includes an updated VBIOS 2170 for the Intel graphics card which will give us a full resolution (1600x900) Clover boot menu. We are also disabling Nvidia Optimus as Nvidia drivers are quite complicated to set up on a Hackintosh. If you don't have an Nvidia Optimus card, you can ignore that part.
4. Install the hardware
Now that the BIOS is ready, you can open up the laptop and install your Wi-Fi card using the instructions here. You should also replace the HDD containing Windows 10 OS with your new secondary drive. The instructions for laptop HDD replacement is here.
Feel free to insert the Windows 10 OS drive into the ultrabay caddy but do not put the caddy into the laptop just yet. We want to install macOS onto to new empty hard drive without messing up the Windows 10 OS.
5. Install macOS High Sierra
Now onto the good stuff. This part should actually be fairly straightforward if the preparation work was completed correctly.
6. Post macOS installation setup
While macOS is at this point fully installed, there are a few post installation steps we must take to allow Clover to boot macOS without the USB drive. We will also make some other final adjustments.
Finally, remove the USB drive and reboot the computer. You should now be greeted with Clover by default and macOS will auto-load after set timeout.
7. Dual-boot Windows 10
Now that everything is done, you can insert the ultrabay caddy with the Windows 10 hard drive into the computer. Boot up the computer and you will see that Clover has added an extra Windows 10 option. Go ahead to choose Windows 10 to ensure that you are able to get back into Windows without issue.
Sometimes the Windows boot manager likes to take over and you will find that Clover no longer becomes available and you will always boot into Windows. This can be easily fixed by going into BIOS using F1 on boot and then updating Startup > Boot; put the new hard drive with Clover at the top of the boot priority list and you should be back in business.
8. BONUS: Re-enable Night Shift
One of the best features of current generation OS's is the option to change screen color tones to rest the eyes in the evening. Apple's take on this is call Night Shift and you can re-enable it on the T420 Hackintosh by running the following patch:
That's it! Enjoy your dual-booting Thinkpad T420!
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March 2023
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