can you use target disk mode with bad logic board

While this fix works as a patch job, ultimately I would suggest upgrading to a new computer within a year or two macOS support lasts around 5-6 years and Nvidia’s Mac support is troublesome at best. Concurrently this issue is likely to arise when you are updating macOS, especially during the major OS upgrade. This problem occurs when the provided Nvidia driver cannot communicate properly with the dGPU. Alternative to the Target Disk mode, a bootable USB recovery drive can help access the affected Mac and recover all the stored data.

Erase the “Macintosh HD” or any drive contains macOS. After the recovered files are saved, navigate to the save location to view the recovered files and folders.

Boot from Internet Recovery Mode or a bootable USB drive.

Also, if your network cannot handle recovery mode, you will need to create a new bootable USB drive. So far, it seems like the T2 security chip was busted by Big Sur. Handing in the MacBook into an ASP (authorised service partner) resulted in them seeing the Logic board die. If not, this is your chance to create a backup via safe mode or target disk mode. Using similar procedures in target disk mode did not work either. If you already have a backup, make sure it’s up to date. In order to remedy this issue, you will be installing a most updated version of macOS. If the last bit of logs show following lines, you are affected: IOConsoleUsers: gIOScreenLockState 3, hs 0, bs 0, now 0, sm 0x0

Verbose mode will display too many details at once, but what you need is at the end of it. halse wrote: you can boot the iMac using the Air disk. If so, you will need to do some digging if your Mac is actually affected. On boot, the loading bar progresses just fine, but it will not actually boot although the bar is full. If you are experiencing the issue I am describing, I can only hope you have a backup. It shouldn’t come as a surprise then if Nvidia is not opting Mac in to their extended support.

While current Retina lines of Macs tend to run on Intel iGPUs and AMD Radeons, previous generation was primarily delivered with Nvidia’s. When Macs with Nvidia Graphics Won’t Boot, with Full Loading Bar

Can you use target disk mode with bad logic board