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Switch macOS Sierra to OpenCore bootloader

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This is a very valuable suggestion. I will do so. But I have a question: is it really necessary to delete the entire drive? Wouldn't it be enough just to delete the EFI partition? After that, I could reinstall only clover, in legacy mode (standard installation). I managed an installation with absolutely all the features (as if it were a real iMac) and I'm afraid that deleting and reinstalling it would not be as "happy".
I would rather buy another ssd to try this. And this whole installation is just an intermediate step: I set out to make an OpenCore bootloader, as good as a clover. But I needed a clover, to know as accurately as possible the hardware I have. Clover seems easier to understand. Or maybe I just know him a little better. Thank you very much for the indication. I will communicate the soonest what results I have.
 
ono said:
This is a very valuable suggestion. I will do so. But I have a question: is it really necessary to delete the entire drive? Wouldn't it be enough just to delete the EFI partition? After that, I could reinstall only clover, in legacy mode (standard installation). I managed an installation with absolutely all the features (as if it were a real iMac) and I'm afraid that deleting and reinstalling it would not be as "happy".
I would rather buy another ssd to try this. And this whole installation is just an intermediate step: I set out to make an OpenCore bootloader, as good as a clover. But I needed a clover, to know as accurately as possible the hardware I have. Clover seems easier to understand. Or maybe I just know him a little better. Thank you very much for the indication. I will communicate the soonest what results I have.
Click to expand...
The trick is to make sure you remove the UEFI Clover totally. You could probably do this by deleting the contents of the EFI partition - the EFI folder and any other item in the EFI partition root should do it. There is a procedure for removing Clover before installing OC that you could follow to make sure you get everything.
If this is an intermediate stage, why not continue to boot from the USB?
 
My experience with older H61 motherboards has also shown that it's better to boot legacy even if UEFI has been added later on by the manufacturer, so that would make perfect sense here.
 
trs96 said:
My experience with older H61 motherboards has also shown that it's better to boot legacy even if UEFI has been added later on by the manufacturer, so that would make perfect sense here.
Click to expand...
You are perfectly right! I felt this would be the problem. I will work in parallel: on another ssd I will install Mojave again, with Clover, to get to know this H61M better and to get the best out of it. In parallel, I will work at OC. Wish me success!
 
I was successful: I deleted the EFI partition from the ssd on which mojave was installed. Then I installed Clover-5119. I unchecked the "only uefi" installation option and carefully chose the other options. Then I mounted the EFI partition with Clover configurator, to adapt config.plist to the specific hardware and to download and install the drivers (bios and uefi), as well as kexts.
Then I started and it booted without a problem, only everything crashed and I could only helplessly admire the result. But Linux saved me again. I went into linux, mounted the EFI partition and made the necessary corrections (I simply deleted the VirtualSMC.efi file) and then everything worked correctly.
Now I'm going to focus on moving to OpenCore. But I will return to Sierra (I promised!) And I will work for Mojave as well.
I express my gratitude for all the help I received!
 
I managed to create a bootable stick with OpenCore. With its help I installed macOS Sierra on the hard disk. Now I'm going to study how I can make Sierra boot without the help of the stick, because the Asrock H61M motherboard is the sixth series and allows booting in legacy mode. I tried, with the same OpenCore, to install Mojave, but at the second boot, it installs for a while, then interrupts, with a firmware error message. Since I have already installed mojave on the same computer (but using Clover), I think I still have work to do, either to compile DSDT or SSDT. But there may be another wrong setting. Any indication could be of great help to me. When I have reliable results, I will publish on GitHub all the results, as I have already proposed.
 
Update.
I want to make some clarifications regarding a computer equipped as follows:
- motherboard H61M-VG4;
- 16 RAM memory;
- GT 730 graphics;
-SSD WD 430R.
-Processor i3-3225;
-Wifi BCM4331
I successively installed Sierra, HighSierra, Mojave and Catalina on it. I tested with each of the 4 macOS systems how it behaves at work for a month for each.
Now I have a conclusion based on the experience I gained. For the High Sierra, Mojave and Catalina systems, after a different operating time, the system is accidentally frozen, and it is necessary to stop and restart it.
This phenomenon does not occur with macOS Sierra, no matter how hard I force the system to work.
I asked myself, why is this happening? Whatever action I took, the same conclusion was reached. I did the same experiment, replacing only ssd with hdd of the same capacity, ie 500 GB.
If I used hdd, the system did not freeze, but there was a delay in responding to commands. Over time, this delay increases. And this delay depended on the macOS system. That is, in the High Sierra, the delay had a value, but in the Mojave it became greater, and in the Catalina it became embarrassingly significant. This delay did not occur on macOS Sierra.
I would think that between freezing the system when using ssd and delaying the response to commands, when using hdd there is a link and this seems to be the computer resources, respectively, the same motherboard, the same RAM, the same graphics, the same settings and the same EFI opencore, the part that makes the difference can only be the processor. I mean, I haven't tried a processor like the i5 or i7 because I don't have them, but I think that's the answer. If I want to be able to work with macOS Catalina without a headache for an Ivy Bridge build, then I should find an i7 processor.
What do you think?
 
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