![]() I ran the installer again - it only took a few minutes and again showed "success" and a restart prompt. I can tell the install did write to the external drive but I suppose it didn't finish. In the Startup Disk pref pane, the external drive is selectable but it still shows as a Sierra boot. I went to the Startup Disk pref pane and made sure the external was selected and tried again. When I restarted, it booted from the internal drive instead. It took about 25 minutes and gave a "success" message, prompting me to restart to finish. I downloaded the installer from the App Store and ran it to install on the external drive. The internal is a clone of the external just for backup, cloned via SuperDuper.Īccording to I can update directly to Mojave on this Mac Mini. The external drive has Sierra and this is what I always boot from. Mojave installation unbootable on external drive I have a Mac Mini (late 2014) with its stock internal drive and an external SSD via USB. But it wouldn't upgrade to 13.2.1, so I erased it to try and do a fresh install, but ran into this same problem, and haven't been able to get Ventura working on either external drive since.Īny suggestions? Is there an error log someplace that might shed light on the problem? I actually had Ventura 13.2 installed on the Corsair GTX, and it worked great. ![]() Both drives have a USB-A connector, so I'm connecting them to the MBA with an Apple USB-A to USB-C adapter. I'm trying this with two external drives: a Corsair Voyager GTX 256GB and a PNY USB 3.2.2 256GB. So I boot to the internal drive, then in System Settings I try to set the external as the startup drive, but then when I restart I get an error message that the drive can't be set as startup and get a "108" error message. When I hover over the external drive, I'm told I can't install to that drive because it has an incomplete installation, and I need to reformat and start over. If I choose "reinstall", I'm presented a choice of four drives: the internal drive, the external drive (greyed out), and two drives labeled "preboot". After four or five restarts, it finally boots into the Boot Recovery System and I'm given the choice to either reinstall or choose a different startup drive. I understand that it's normal for the system to restart more than once during installation.īut then the system keeps restarting. The new installation appears to be booting, but when the wait bar reaches about 50%, the system restarts again. Once the install is complete, the system restarts I booted to the startup options and set Startup Security to "Reduced"įormat external drive APFS Container with GUID Partition Mapĭownload Ventura 13.4.1 from App Store and install to the external drive ![]() But after running the 13.4.1 installer on the external drive, it refuses to start and complete the installation. I'd like to keep that installation intact and install Ventura 13.4.1 on an external drive for testing/experimentation. Ventura 13.4.1 external bootable drive refuses to start I'm running Ventura 13.4.1 on my 2020 MacBook Air M1. Somebody can help or advise me, what I can try further to solve this problem? Second, I tried to check if the memory is faulty by memtest but no error was found. media" by the recovery mode and boot with USB after pushing Opt and select USB, it crashes with black screen of Reboot because of Problem.įirst I have checked, If I can boot with USB in another way and I have installed Ubuntu on another bootable USB and could boot from USB without problem. But after I set it to "Allow booting from ext. When it is set to "Disallowed booting from external media" by the recover mode, then I can boot up with USB and they should the sign that startup allowance with external media is needed. But it crashes at once with black screen of Reboot because of Problem. But with mac mini 2018, when I select USB on MacOS installer after pressing Opt. In order to make clean installation to big sur from mojave, I have prepared bootable USB, which works perfect with my second mac mini 2014. ![]() But security update with mojave doesn't work at all. Mac mini 2018 firmware was revived and restored by apple configurator 2 and Mojave was installed without problem by internet recovery. After updating to monterey, several crashes I had to experience and it gets more and more often. I have used this mac mini 2018 for more monthes without any problem on big sur.
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