![]() The Mac will restart with options in NVRAM resetting. To reset the NVRAM on Mac, restart Mac and hold down Command + Option + P + R. NVRAM is a memory section on your Mac that store data like volume settings, screen resolution. If the Sierra or High Sierra installation is still won't complete in Safe mode, you can try to reset the NVRAM. When you Mac is in Safe mode, go to App Store and get the High Sierra update. To get your Mac into Safe mode:Īs you Mac start up, hold down the Shift key until the Apple logo appears. Install macOS in Safe ModeĪnother way to install Catalina, Mojave, Sierra or High Sierra successfully is to install the macOS in safe mode. If the installation get stuck when you try to update the Mac from Mac App Store, you may download macOS software from Apple website, which is the Combo updater which includes all the files required to update the macOS. After the Mac reboots, try to install the macOS Catalina, Mojave, High Sierra again. Hold down the power button to power off the Mac. If you confirm that the installation is frozen, try the following methods to fix. Therefore, before taking further action, press Command + L, which will open the log file and shows you if the installation is still going on and the amount of time left. And forcing restarting a Mac during OS installation may cause data loss. So it doesn't necessarily mean that the macOS installation is frozen when the Mac stay at “20 minutes remaining” for two hours. Sometimes, it just takes a very long time for you MacBook or iMac to install the macOS Sierra or High Sierra update. Troubleshooting macOS High Sierra Install Problems # 1.Check If the Install is Still Going on Calculating time remaining." Here shows you how to confirm if the installation is still going on and how to complete the update successfully. If your macOS update also get stuck at "Installation is in progress. The progress bar has been stuck at 40% or something, showing: "Installation is in progress. After downloading the macOS installer, you try to install the macOS Catalina/Mojave, macOS Sierra or High Sierra but the installation get stuck. I don't know why either, maybe there was a problem updating the firmware.MacOS installation problem happens all the time. There may have been another way, but I couldn't figure it out. I then had to open the iMac again, swap the SSD for the HDD again, and then I could do a fresh install. To install High Sierra on the third-party SSD, I had to open the iMac again, put an OEM Apple HDD back, install an OS before high Sierra, then upgrade to High Sierra, installing the Firmware in the process. I forget the exact message, or if there even was one, but I think I wasn't even able to start the install process because the SSD showed as greyed out on the installer when picking the installation drive. ![]() The issue appeared when I went to do a clean install of High Sierra on the new SSD. I swapped with a third-party SSD and cloned the OS from another Mac I had and was running High Sierra on it just fine. ![]() The reason why is because I pulled a failing HDD from the Mac that only had Yosemite installed. I could install earlier OS versions, but not High Sierra. I have personally had a firmware issue on an iMac that prevented me from installing High Sierra to an non-Apple SSD. Click to expand.I don't know why either, maybe there was a problem updating the firmware.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |