I have just re-made the Catalina installer, with the updated OS. It could not install from it, like it could not copy. Then I have tried to reinstall Mojave, it worked pretty cleary last year the exact pen drive. It failed as well, saying something like: not package found, contact the system administrator. I was able to boot from USB pen drive Linux and install Windows from DVD. But no macOS from the pen drive, even from what worked fine before. I have reseted the BIOS several times, no succes. The first sign of something wrong was this: When I first tried to boot Catalina, it said something about BIOS (BIOS, not UEFI) reset and enter setup. I hapenned several times on my attempts. If something screwed in my hardware? The USB ports? The BIOS perhaps?
I purchased two of these Sipolar 10 port USB 3.0 hubs with the thought I'd be able to plug in 20 iPads to do software restores simultaneously, but I only can get 12 to be recognized at any one time. Both hubs function properly with 10 iPads plugged in to each at once, but as soon as I connect both hubs I get a max of 12 iPads recognized by the OS. We're using Apple Configurator 2 to restore iPads, and I have a separate older/slower 32 port USB 2.0 charge/sync hub that works fine with all devices plugged in.
I'm using a 2014 Mac Mini 7,1 running 10.15.3. I've tested the hubs with a few difference Macs and OS's and have had the same issue. From what I can tell these hubs use a RealTek USB chipset, but no drivers are offered by Realtek for them.
I attempted to daisy chain them (not ideal) and still have the same issue. Has anybody run in to a similar issue using identical USB hubs connected to individual ports on a Mac?