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Hi guys, yesterday I accidentally installed the boot-loader “Clover” on the EFI partition of my MacBook Pro (Mid 2012 - A1398). From that point on, the Macbook booted into Clover and not my normal system. I was able to choose to boot into Recovery Mode, so I had access to the hard drive again. Then I decided to rename the folder /EFI/CLOVER/ into /EFI/CLOVER-OLD in an attempt to disable Clover. But now i have big trouble because my Macbook won’t boot anymore at all. The screen stays completely black and the keyboard does not work as well. I cannot boot into Recovery Mode nor can I reset the NVRAM or SMC, etc. The keyboard simply doesn’t respond. The only thing that happens is that the startup sound (“chime”) is playing constantly in a loop when i turn it on :( So its no power issue, the Macbook is still reacting to the On/Off button but boot doesn’t work. I have already removed the SSD drive, but the issue is still there regardless of the hard drive being connected or not.. I really don’t know what I can do ? I think it is the logic board, right ? Can I repair this issue by replacing the EFI BIOS Rom Chip / EFI firmware or something like that ? Would be very grateful for your advice ! Best regards!
Do you have access to a second Mac? If you do you should be able to boot up your MacBook Pro in Target Disk Mode so you can then access its drive from the second Mac that way you can undo the folder rename you did to re-able Clover boot loader. Apple T/N: Share files between two computers with target disk mode As to disabling Clover, it doesn’t appear to have an undo function within the product. I suspect you’ll need to re-install the Mac EFI from Apple. Here’s Apples TN on what if offers for EFI updates: About EFI and SMC firmware updates for Intel-based Mac computers. But, you’ll need to first get the system running before you can even give this a try. From my understanding Clover is really meant to be used in a Hackintosh system not a real Apple Mac system. Reference: Clover
Had this exact same problem (repeating boot chime loop, inability to use any startup keyboard commands) My issue was caused by my inserting a usb with Clover on it into my genuine Apple store purchased macbook pro retina & proceeding to &&^& around like an idiot. This resulted in my deleting the efi bootloader or some $@$. Took it to Apple, who wanted to replace the logic board at a ridiculous cost despite saying that all their tests regarding the physical condition of the machine and it’s components passed fine. I tried explaining what happened, but the default response was simply to swap the motherboard for what was basically the cost of a new macbook pro. Purchasing and installing this Chipmunk Matt card FIXED the problem: http://www.cmizapper.com/products/mattca… It was easy as !&& to install, I booted right up into MacOS, and all works well, except the serial number displayed under About This Mac changed. Not sure what that means, but &&^& it. I hate Apple so much I’m trashing this machine anyways lol
I have the exact same issue. Unfortunately booting into target mode from another MacBook doesn’t work for me. Neither by remote keyboard. Where you able to fix without manually pulling and reprogramming the EFI chip? Really don’t want to go there if I don’t have to…. Any help would be appreciated!
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hi alex s. , i have the same issue. i messed up my macbook because of clover. do have a solution already?
Hi all, someone found a solution ? I have exactly the same problem …
http://www.cmizapper.com/buy/mattcard-ma… fixes the problem. Don’t throw your macbook away. This chip will give you a new BIOS and fixes the problem. I just plugged it in and it worked immediately.
