How to get back OC bootloader?

My SSD was partition into 2. One for MacOS and the other for Windows 11. I have another SATA SSD which I partition into 2 as well. One is a exfat the other is ext4 which i installed Debian 12. After installing Debian 12, Grub took over the OC bootloader.

Can someone please give detailed steps on how to recover OC bootloader? I want to get back to MacOS. Thanks.

submitted by /u/Bestcon
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