Hackintosh 10.14 not updating to 11.1

Hello everybody :)

I recently changed my GFX from nvidia GTX 1050 (which got me stuck in 10.13.6) to a Saphire Radeon RX5500XT to be able to update

i first update to 10.14 because i thought i could have graphic acceleration with it, but no, so i decided to update to the latest version, 11.1 Big Sur

I downloaded the update from the control center, and the update seemed to go well, it downloaded the whole thing and tried to update, but when it reboots, it goes back to 10.14 without updating.

I tried to boot from Preinstaller, but it gets stuck in the beginning of the boot, i don’t really understand why. I tried booting from the second « new » option that appeared, which is « Firevault from Preboot », but it gets me back into 10.14 without installing anything.

I tried to look up for a solution on the subreddit, and found similar problems, but none of their solutions worked for me.

anyone has a solution ?

My Specs : GFX : Saphire Radeon RX5500 XT CPU : Intel i5 7400 HDD: I have two of 1TB, macos is installed on the second and has half of the volume for itself.