Stuck in boot screen after update

[MacUser341]

Hello
I have a dual boot with windows 10 and Mac OS X on single drive with Open Core.
After an update to Mac OS when I’m trying to boot into Mac I get the boot screen stuck , I can still boot to windows .
How can I fix it ?

[stevezz3]

@MacUser341 Hi, please give more details about your model, macOS version and EFI version.
You can first try to reset NVRAM by pressing Space at OC boot page and choosing Reset NVRAM.
If the problem still exists, I suggest adding -v in config - NVRAM - Add - 7CXXX - boot-args and take a screenshot when the device got stuck.
Also make sure you are using v1.5.2 EFI release(BOOT and OC are completely replaced, which means delete and copy) and there's no PM981 disk.