Unsupported Mac: Latest OSX & Windows dual boot




Here I have used 2 examples: 
1. MacBook Air 2015 model 13” which is a UEFI boot with GPT support to install windows 11.
2. MacBook Air 2012 model 13” which is a Legacy bios with MBR support to install windows 11. To install Win11 on Legacy bios, you’ll need one extra tool called GPT partition edit

https://sourceforge.net/projects/gptfdisk.

The app will help you to covert your bootcamp partition to a GPT partition before you install windows 11 using the Rufus bootable USB described below. There is a youtube video to know the following commands for terminal after installing gptfdisk on your Mac. 


Write in the terminal 


sudo gdisk /dev/disk0

p

x

n

w


Done 


The idea Of Patching the OSX: 

Here I may clarify the issue about patching the OSX installation package and bypass few firmware requirements that may not supported by your existing Mac hardware will not have any impact in the performance of your OSX. When you roll back to unpatched version you simply need to clear your SMC, NVRAM to clear static settings. There is no risk associated with hardware or firmware about patching your OSX or windows installation disk to bypass things. From my experience I can say I have trial it numerous times on few models but didn’t find any adverse impact at all. 


PROBLEMS WITH PRE 2013 MBA: Non Metal Base Mac cannot install SONOMA, I had success installing Ventura and Monterey but the stage manager did not work. The trackpad was shifty because of driver probably. Also had full success installing Windows 11pro. Problem was the same with trackpad driver. Bomberdier app had the Bluetooth driver which did work. Had to block the Intel HD3000 driver from windows from the services for auto detect. The generic graphics driver was fine. So both OS can be used using a Bluetooth muse if anyone can’t find a perfect driver for trackpad. You can’t install bootcamp before deleting the Intel HD3000 driver which actually blanks the screen. 




MacBook Air 2015 13” model 7,2 : 

You should have OSX Monterey installed on your system. Follow following steps to install OSX Sonoma.   

Download tools:  


2. Rufus app : https://rufus.ie/en/ 




Step1: download opencore legacy patcher  

1. Whatever the OSX you are running on the Mac just download the app first. Then open the app.  

Step 2: making a bootable USB using the opencore app. 

1. Use the option to “create macOS installer” for the host Mac then make the USB.  

2. If you press settings, you can select the target Mac model if you are making the usb not on a host machine. But it is better to make on the host machine.  

Step 3: boot the system from USB and install Sonoma. 
1. I have upgraded my SSD with Intel SATA3 SSD 6Gbps before install. To have enough space for windows 11.  

2. You’ll see the recovery screen for Sonoma  once you boot from EFI disk of the USB. 

3. Use the disk utility to erase the disk and then start installing sonoma closing the disk utility.  4. Do not remove the USB during installation 

 5. Do not do anything during installation and let the OSX install by itself. It will restart 3-4 times to finish the installation of Sonoma..keep power on …don’t touch anything.  

6. Once you see the screen to select region then select all the setup and enter Sonoma.  

Step 4: creating dedicated partition for opencore and install opencore to that partition  

1. In Sonoma open disk utility 

2. Select View all devices then select the SSD on the top and click partition. 

3. Now create a 200MB MS DOS(Fat16) partition not a volume, select MRB. Name it “opencore”.  Any FAT partition will do the job. 

4. Now open the opencore app and create installation docs then install it to the new partition name “opencore” that you just created under ssd.  

Step 5: removing opencore from SSD as you have it in the new partition now 

1. Open terminal on Sonoma the type: sudo diskutil mount EFI then enter and type your password then enter again.  

2. Now Open finder then you see EFI partition as you just mounted it from terminal. Open the EFI partition and delete 2 folders from EFI. Restart.  

3. Now you have opencore installed only on your opencore partition that you created. 

 4. Get the USB removed 5. You may install opencore on your dedicated partition over again if you see any issue during booting the system and need to hold option button to see your dual boot icons.   

Step 5: post installation root patching 

 1. Once you are inside Sonoma above are done now  use the opencore app to post installation root patching then reboot.  

2. Now it’s done. Sonoma is ready to use  




Installing windows 11: 

Step 1: making bootable USB  

1. Get a copy of windows 11 ISO file from Microsoft website.  

2. Use Rufus app on a windows computer to make a bootable usb of windows 11. Select UEFI bios and GPT partition, once you press start you’ll see a screen with tick boxes, then bypass everything ticking the boxes. Tick all the boxes. Put a local user name that you prefer.  

Step 2: making a partition for windows 11 

1. Open disk utility and select view all. 

2. Select the SSD press partition. 

3. Now make a partition not a volume should be exFat, GUI, and select a size you prefer for windows. 

 4. Press first aid few times. 

Step 2: putting bootcamp and drivers into the windows 11 USB that you made on Rufus: 

1. Download bomberdier app then open it. Select your Mac model then download the driver package.  

2. Now get to the folder where it is downloaded then open the package. Copy all from the package and paste into your windows 11 bootable USB making a new folder “bootcamp” or driver or so.  Remember to find and delete the intel HD3000 graphics card driver. This driver from will blank your screen if you install on windows 11. 

Step 3: installing windows 11 

1. Put the usb in and reboot the system. 

2. You’ll see EFI boot logo with USB icon to boot from USB. 

3. Simply follow instructions on the screen and get to the screen to select custom installation.  

4. Now erase/format the partition you created for windows.  

5. Then simply install windows 11when you see the partition came as unallocated Space to let the windows partition & format it by itself before installation.

6. Now you will have to press option key to see the EFI boot of your opencore partition. Get back to Sonoma and install opencore to opencore disk another time. Now you’ll see dual boot without pressing option key.  

Step 3: Installing bootcamp on windows 11 

1. Simply open the folder from USB that you copied drivers, install bootcamp.  

2. Now when you connect to internet, download iTunes and install the app. 

 3. You’ll find an app called Apple software update on windows came with iTunes. Use the app to update bootcamp. 

 4. Now you’ll be able to open bootcamp control panel from taskbar then configure your trackpad. 

5. Do post installation root patching again when you get back to Sonoma. 

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