![]() Use safe mode to isolate issues with your Mac and Playing Safe - what does Safe mode do? Test in safe mode to see if the problem persists, then restart normally.Reset your Startup Disk and Sound preferences, if needed, after resetting the PRAM.Reset the System Management Controller (SMC).Disconnect all third-party peripherals.Shutdown the computer, wait 30 seconds, restart the computer.You should try each, one at a time, then test to see if the problem is fixed before going on to the next.īe sure to backup your files before proceeding if possible. So, you are saying that you have tried using the USB keyboard but it, too, does not work with an OPTION boot? If that is the case, then work through the following:Ī Troubleshooting Procedure that may Fix Problems with macOS El Capitan or Later Can I delete the BOOTCAMP volume and repartition using Disk Utility in Recovery Mode? I guess I could try removing the BOOTCAMP partition, but there's no bootable MacOs on that drive, so no way to run BOOTCAMP Assistant. I have a copy of the Catalina Public Beta on an external SSD, and that boots and runs fine. Still doesn't work.įWIW the BOOTCAMP partition boots and Windows comes up w/o any problems. I also tried booting in Internet Recovery mode, erasing and reinstalling. I tried unplugging for 15 seconds, and booting with CMD+OPT+P+R. I tried using Recovery Mode to erase the Macintosh HD partition and reinstall. When the system rebooted after the upgrade it goes to a screen that says (something like) "You Mac was restarted due to an error." After a couple of minutes it reboots and the same screen comes up. The internal drive is a 3TB Fusion drive w/ a 200 MB BOOTCAMP partition. ![]() Thanks!Ĭatalina Install Failure on Fusion Drive w/ BOOTCAMP Partition I tried to upgrade my late 2015 27" Retina iMac from Mojave to Catalina. Please let me know what, if anything else I am able to try. It seems like there is an issue somewhere buried and inaccessible through Disk Utility tools, First Aid, and Diagnostics, as they all come back without problems or issues. It will always boot into the restore utility and if I choose to select the boot device using the startup disk tool, it will reboot and go back into the restore utility. The installation completes, but it will not boot. I decided to recreate the USB installer using another Macbook Pro and tried the install again, but it returns the same error.Īfter that, I reset the NVRAM and SMC, but the error persists.įinally, I tried to install macOS from the internet option per the Apple support instructions and made sure the Catalina USB installer was not plugged in. The download is either damaged or incomplete." ![]() "An error occurred validating the installer data. It gets to about 2% left to complete and gives the error: ![]() I followed the instructions from the Apple support site to erase the disk using Disk Utility directly after boot and then proceeded to install Catalina. After installing Catalina, which went off without a problem, I noticed a few quirky issues and decided to do a clean install and not have it restore my data, apps, etc., from Time Machine. The download is either damaged or incomplete." Hello! I recently downloaded and prepared installation media, a USB installer as directed on the Apple support website, to install Catalina on my 2017 Macbook Pro A1708 which was running High Sierra. Note: The Hard Disks were in perfect working condition before the update and I tested it multiple times for any problems and it seemed to function normally.īootable USB Installer for Catalina 10.15.4 Error "An error occurred validating the installer data. Currently the Mac is stuck in recovery mode since I booted using the installer thus I would appreciate any help I can get regarding this issue. And while in all of this, the Mac is rendered incapable of performing startup commands such as to reset the pram or to go to internet recovery no matter how hard I tried to type the commands (plus terminal didn’t help either). And so I had to restart again and vice versa, this got to the point where I had to create a bootable usb installer of Mojave to see if that would fix my issue but I couldn’t install it since the Mac wouldn’t detect any hard disks. There were no disks to be found so when I restarted it, the Mac would just boot until it tries to install Catalina and the error pops back of it being unable to be installed and again, no disks to be found (even in disk utility ). So I tried to update my late 2012 Mac to the latest version of macOS Catalina but in the installation phase it gave me an error where in that the software could not be installed and as a result of this, it created a loop since when it went to the prompt to restart from a startup disk. ![]()
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