Thank you so much for this! I was having a hell of a time on my own, then I found your post which made my system boot perfectly. One caveat, before updating to 10.15.1 you need to update the wintergreen kext to version WEG 1.3.4 available here...
I would like to thank everyone in the forums who leaves feedback, otherwise I would still be stuck on Lion. Even though it may not be as well written or as clear as it should be, I hope this guide will help someone.
My Specs:
-ASRock H55M-GE
-Intel Core i3 CPU 540
-NVIDIA GeForce GT 430...
Same issue here...
I have an ASRock H55M motherboard and a GT 430 Video Card. Lion works great, but when i try to boot off of the usb drive to install ML the screen will flash the gray mac screen for just a moment then the screen goes black and the computer reboots. Any ideas?
Thanks
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