#High sierra macbook air 2011 update#

In contrast to my MacBook Pro, the update finished without problems on the iMac. Incidentally, I also have a late 2009 iMac where the original hard drive has been swapped out (drive failure - not even the same manufacturer) and an SSD occupies the optical drive bay. Afterward, I put the SSD back in and installed Hugh Sierra without any problems - as the firmware update had already been completed, there no longer seemed to be the system check that had tripped me up previously. The installation with the original HDD completed without any problems, including the firmware update. Luckily I kept the original hard drive around, and after trying the newest installer and rebooting into safe mode several times without any joy, I just took a screwdriver and put the old HDD back in temporarily (there are good guides on ). Turns out it was the aftermarket SSD I had installed pretty much as soon as I bought it. Apple MacBook Air Z0YL00174 Laptop Intel Core i5 10th Gen Intel. Had the same problem on a MacBook Pro 17” (Mid-2010). Installed High Sierra on a Thinkpad t460, everything works flawlessly except the wifi.

If that is the case, it probably can be fixed within $20 to get a replacement. It's said that, most of time, it is the hard drive cable which is out of order, instead of the chipset. So, you might have to get the primary SATA port work and connect your disk to it.

#High sierra macbook air 2011 upgrade#

That means the upgrade process was interrupted.

The firmware upgrade process only recognize the ESP (EFI System Partition) of primary internal drive. The root cause of the failure at point A, in your case, is no internal drive in main bay. Hence, it reports 'An error occurred while verifying firmware'. As a result, the installer find out that your firmware is NOT a latest version still. It double checks the version of firmware to make sure it was updated successfully in previous process (namely point A). (marked as point A)Īfter the upgrade process (regardless success or fail), the installer continues. Then restart automatically and trigger the firmware upgrade process.

The easy fix is to verify your backup and then erase the volume and run the installer against a blank / erased main storage drive.īecause the APFS requires support from a new version firmware, your mac's firmware will have to be updated to the latest version during the installation of High Sierra.Īfter the first restart, the installer prepares the latest version firmware which suitable for your mac model onto EFI system partition of your main disk with bless command. Apple has introduced a new file system APFS in High Sierra.