I’m using a Mac Mini (mid 2011). It was the lowest spec Mac Mini when I bought it (2.3 GHz, 4 GB Ram). It’s running High Sierra now, but I can’t upgrade to Mojave because it’s not supported. TR runs fine and I’m driving 2 screens from it (TR on one screen and streaming media on the other).
Wait, you’re still able to upgrade to High Sierra? I have a 2011 iMac that’s not supported by Mojave and I didn’t try to upgrade it to Sierra or High Sierra until after Mojave came out… and I couldn’t see a way to get it (e.g. from the Mac App Store).
There’s your problem, don’t go to the latest OS version always. Every time you do the min spec increases and demands on the laptop increases leaving less room for trainerroad or other apps to work with.
I have same MacBook Pro and I’m on an OS version that’s maybe the one they did in 2015, trainerroad runs ok plus VLC for media.
That did it, thanks! It’s a computer that belonged to my dad and has just sat in my office since I inherited it… with High Sierra (and a Bluetooth 4.0 dongle sigh) it might turn into my trainer computer.