Hi, I have an opportunity of an old Mac Mini solely for Zwift. I was wondering if any one encounters any issues with crashes or over heating and compatibility? Also, is it likely Monterey will become unsupported by Zwift in the next 2 years? Thanks
I’m interested in this too. I have a 2010 Mac Pro running Monterey by way of OpenCore. It’s fully upgraded and runs Zwift fine but if Monterey support goes I have to find a different machine. 
The 2014 Mac Mini seems a bit old to be honest, what exact specs does your one have?
https://support.apple.com/en-us/111931
If you were to update it to SSD storage that would help a lot with general speed.
Zwift still runs on macOS Mojave, far older than Monterey. They haven’t said anything about dropping support for operating systems that Apple no longer supports.
So it will work but how well it works depends on which CPU you have, and of course if it has a mechanical HDD that is going to be pretty bad. Replacing the storage does not look very fun in that machine.
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Good grief!! 
I upgraded the CPU in a 2013 Mac Pro (that’s the famous round one). It looks simple compared to the above.
Thank you all for your quick response.
It is an i5 2.8 with 8Gb of ram and SSD - Intel Iris Graphics
Looking on Zwift specs, the minimum OS is 10.14.4 (Mojave), so assume once a new OS comes out it will be unsupported. As Monterey (MacOS12) is the latest OS (Late 2014) Mac Mini can support, I think it will become unsupported in 3 years time or so. However, 3 years s probably ok anyway as a stop gap.
Thanks.
Zwift have not been retiring old versions of macOS as Apple introduces new ones.
And you could run a newer version of macOS by using OpenCore Legacy Patcher (which is not supported by either Zwift or Apple but would work anyway since you have a Metal compatible GPU). No need to do that unless you want to keep getting security patches.
Yes! I have the same Mac Mini 2014 setup for Zwift. I had multiple crashes during rides. I have tried changing your application’s display resolution (I changed mine to 720p). In addition, I also upgraded the HDD to an SSD to alleviate lag in performance.
I would consider upgrading to a newer machine - even though it costs money it just avoids the complications of old MacOS versions.
The newest Mac Mini is a better deal than the older ones, 16gb base ram is far more suitable for modern needs and it’s a fairly fast machine as the benchmarks show.
I use one with Zwift and connected to a 55" TV screen and it works quite well.
OCLP mentioned above by Paul gets complicated these days with Sonoma and Sequoia because Apple support for a number of GPUs requires CPUs that support AVX/AVX2. If your CPU supports this, that’s fine, but quite a number of the classic Intel Mac processors don’t.
Older GPUs like RX580 are safe, but newer ones are not.