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Published 20 hours ago • verified publisher icon dosdude1

iMac-20, mid 2009 (9,1) 9 beeps after Patcher Catalina

Open g-horakhty opened this issue 3 years ago • 3 comments

This EFI certainly got corrupted, during the installation, does anyone know if using the "firmware RestorationCD1.9.dmg" can solve this problem?

g-horakhty avatar Oct 02 '22 21:10 g-horakhty

Catalina Patcher and Catalina Installation does not touch the EFI firmware in any way, shape, or form. Did you apply the "APFS ROM Patch" (a separate tool, NOT included with Catalina Patcher)? If so, that is what caused the issue, and the only way to recover is to reflash externally using an EEPROM programmer with a known-good dump from another system.

dosdude1 avatar Oct 03 '22 20:10 dosdude1

Yes, I tried installing the "APFS ROM Patch", but will just resoldering and reflashing fix it? Thanks.

g-horakhty avatar Oct 04 '22 14:10 g-horakhty

Yes, I tried installing the "APFS ROM Patch", but will just resoldering and reflashing fix it? Thanks.

Hi, i had the exact same issue but i've resolved it using the backup ROM that APFS ROM Patcher created, then i used a generic EEPROM programmer that i bought on Amazon using the provided clamp (not recommended but i had no soldering tools). tl;dr: Don't use APFS ROM Patcher on a iMac9,1 especially with a Nvidia chipset. (it is deprecated anyways)

5jd avatar Mar 10 '23 18:03 5jd