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[GUIDE] Install macOS 10.15 on P55-USB3 board

Joined
Dec 10, 2010
Messages
24
Motherboard
Gigabyte P55-USB3
CPU
i5-750
Graphics
RX 580
Mac
iMac
Mobile Phone
iOS
... Do you mind sharing your BIOS settings…the ones that are different than the defaults?
These are pics taken from Internet. I have written in green the options I use in my system. The rest are as in the pics. In memory options and timings I have everything in auto.

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Joined
Mar 18, 2010
Messages
56
Motherboard
Gigabyte GA-Z87X-UDH3
CPU
i7-4770K
Graphics
GTX 650 Ti
Mac
MacBook, MacBook Pro
Mobile Phone
iOS
Thank you for that BIOS information.

We tried a Mojave installation on a WD Blue SSD and it wouldn't boot.

So, we tried installing Mojave and Clover to a 128BG SanDisk Extreme USB stick and it seems to run fine! This indicates that the motherboard is very sensitive to Mojave and particular SSDs.

We're ordering a Samsung EVO 860 1TB SSD and hopefully the issues will be gone when we use it.
 
Joined
Dec 10, 2010
Messages
24
Motherboard
Gigabyte P55-USB3
CPU
i5-750
Graphics
RX 580
Mac
iMac
Mobile Phone
iOS
The Samsung EVO 860 came today and my friend installed Mojave and Clover to it per your original post's instructions, and it seems to be running great.
Thanks again for posting and all of your help.
Glad to read this. macOS is sensitive to certain types of hardware. It is always convenient to choose hardware that Apple includes in its computers or that has been tested in macOS and we know that it works. Regarding SSDs, although in theory they are all based on a similar mechanism, Mac computers have used Samsung's EVO SSD drives and so I chose it. However, I have another SanDisk SSD that works perfectly as a second disk for data, but does not serve as a system disk.

Remember Trim!

trim.jpg
 
Joined
Mar 18, 2010
Messages
56
Motherboard
Gigabyte GA-Z87X-UDH3
CPU
i7-4770K
Graphics
GTX 650 Ti
Mac
MacBook, MacBook Pro
Mobile Phone
iOS
Glad to read this. macOS is sensitive to certain types of hardware. It is always convenient to choose hardware that Apple includes in its computers or that has been tested in macOS and we know that it works. Regarding SSDs, although in theory they are all based on a similar mechanism, Mac computers have used Samsung's EVO SSD drives and so I chose it. However, I have another SanDisk SSD that works perfectly as a second disk for data, but does not serve as a system disk.

Remember Trim!

View attachment 476244
Well, we hit another hiccup…and it could be coincidental. Ethernet was working fine but suddenly stopped. The card still shows up in System Report but Network prefs say cable unplugged. Multiple troubleshooting steps lead us to believe that the onboard ethernet has gone bad.

Did you actually test your ethernet port and have you done so lately?
 
Joined
Mar 18, 2010
Messages
56
Motherboard
Gigabyte GA-Z87X-UDH3
CPU
i7-4770K
Graphics
GTX 650 Ti
Mac
MacBook, MacBook Pro
Mobile Phone
iOS
Thanks. We've ordered an Ethernet card. Reasonably sure it's the same Realtek chipset as the one onboard.

The one on the motherboard was working one moment and the next it wasn't. Doesn't work when booted from the old Sierra installation, either, so we think that eliminates a software issue. BIOS settings look OK, but we'll have to disable the onboard ethernet when the new card is installed.
 
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