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[HELP] Can’t dual boot ! Windows-Mac

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First I have a 250Go for my windows system a 2To HDD for my windows downloads and others... and a 250 Go HDD for my future macOS

Yesterday i followed that tutorial to install mojave on my computer :


I hoped to have a computer with windows and macOS.

To be able to switch when I want.

[install phase]

Install phase worked fine i did all like the tutorial.

I booted on a functional macOS mojave so at this phase i can Restart computer and all work fine.

Then i wanted to switch to windows

I went to clover, I had about 3 circle with macOS and 5 circle with windows. I tested all the windows circle and I always had the same result. A black screen with this


Then I try to boot on my windows SSD and I had no operating system detected.

I booted on Ubuntu with a key to make a backup of all my data of my 2 windows hard disks. All the data was intact.

I didn’tunderstood so people said to me delete your windows disks and reinstall windows.

I did it. Windows work fine now but macOS doesn’t work anymore.

When I boot on clover I only have windows circle like the picture I uploaded. When I try to boot on the mojave where mojave is installed. I have same message.

« Select a proper boot device » or no operating system

Why can’t I use the two OS as dual boot ? Can brainy people help me ?

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1.Boot macOS drive using bootable USB stick

2.Open Clover Configurator

3.Select Mount EFI on left column

4.Click Mount Partition for the drive macOS and Windows is installed on

5.Click Open Partition

6.Navigate to EFI/Microsoft/Boot/

7.Rename bootmgfw.efi to bootmgfw-orig.efi

8.Restart and Windows should be an available boot device option

Edit : You can also read how I did dualboot here https://www.Olarila.com/forum/viewtopic.php?f=28&t=6656. Scroll down to How to Dual-boot (Bios is set to UEFI mode) in first post.


Gitter Chat

Acer Aspire V15 Nitro- Black Edition VN7-592G/HM170 Chipset

Intel i7-6700HQ, 8GB RAM (UEFI Clover Catalina)

MSI B360 Gaming Arctic

Intel i5-8600 16GB RAM Asus Radeon RX580 8GB (UEFI Clover Catalina)

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