OCLP 0.0.14 is out offering to disable verbose and some other add ons. Did no test it myself.
Whoever is using OCLP can try it out without touching the Big Sur installation. Of course please keep your running former EFI to put it back in case something does not work as planned.
Thank you, Ausdauersportler! It works well, but you have to make some important clarifications for people like me who, while fussy and examining the details... nevertheless do not pay attention to some important things.
1) The version of OpenCore-patcher.app (Mac application) indicated as "Latest" to download is 0.0.14, but if you do "Get Info" it says 0.0.12. When you start Terminal, however, Terminal, at the top, says it's version 0.0.14
2) The MAIN version, on the other hand, is already 0.0.15 with further changes and improvements. Therefore it is better to use this version.
I foolishly did ten reboots, reapplying Patcher 0.0.14 or 0.0.15 each time and recreating the EFI, BEFORE realizing that option 4 was added to disable Verbose mode and that if I didn't intervene first with this Option... the Verbose mode would continue ...
Instructions correct and suitable for Newbie
My indications concern the 27'' iMac late 2013. For other Macs, therefore, it will also be necessary to intervene on options 2-5. But don't ask me how, kindly, as I don't know how to answer you.
Simply download the
OCLP 0.0.15 ZIP file from
https://github.com/dortania/Opencore-Legacy-Patcher.git -> CODE -> "Download ZIP", unzip it and run "OpenCore-Patcher.command"
At this point, running Patcher 0.0.15 in Terminal, you must first choose the option 4. Patcher Settings and from here you can set
1. Enable verbose mode (currently true) to -> false
In my case, for my Mac, I left
2. Enable OpenCore DEBUG: currently false
3. Enable Kext DEBUG: currently false
4. Always assume metal GPU: currently false
5. Always assume updated Wi-Fi: currently false
Obviously, I set option 1 to -> False and restarted the Mac.
Magically, the Verbose mode has disappeared
IMPORTANT! Obviously, once this is done, from the main Patcher window it is necessary to execute Option 1 to recreate a new Build and the Option 2 to transfer the new EFI to disk.
I put the EFI on the EFI Partition of "Macintosh HD" disk, but for safety, I also transferred it to the installation USB Key