How to Fix Catalina 10.15.5 upgrade to Big Sur 11.1 error: big sur install “quit unexpectedly”
Network issues on Hackintosh or unsupported Macs are typically caused by chipset incompatibility, incorrect kext pairing, or corrupted network preferences.
Quick Fix Steps
- Identify your network chipset: Open System Information > Wi-Fi/Bluetooth or use Hackintool.
- Use the correct kext: For Intel Wi-Fi use AirportItlwm, for Broadcom use BrcmPatchRAM, for Ethernet use IntelMausi or RealtekRTL8111.
- Reset network preferences: Delete /Library/Preferences/SystemConfiguration/com.apple.airport.preferences.plist and reboot.
- Check privacy settings: System Settings > Privacy > Location Services must be enabled.
Verification
- Wi-Fi connects after reboot.
- Bluetooth pairs and stays connected.
- Location Services works in Maps.
Related Searches
Original Question: "Catalina 10.15.5 upgrade to Big Sur 11.1 error: big sur install “quit unexpectedly”"
Hello all,
I've searched extensively for this for 2 days and cannot find a solution to it anywhere.
The setup downloads fine, but as soon as I accept the terms and conditions, then select which drive I want to install to, the installer simply quits, and provides the following message: "big sur install quit unexpectedly. It then asks if I want to reopen the application. If I do, I get the same result.
I also get the same result by creating and booting from an install media USB with Big Sur 11.1
I'm running OC 0.63 and my setup can be found below.
i7 9700k
Gigabyte z390 Gaming X bios F10h
32gb DDR4
Radeon 6800 xt
Archer T6e Wi-fi (BCM 4360 I think).
Any help would be greatly appreciated as I;m scratching my head over this one.
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