Can I Skip macOS Versions?
Contents Yes You Can, Within Limits. for Example, If with Your Mac Pro You Wanted to Upgrade to Lion You Would Have to Install Snow Leopard First Because the...
Yes you can, within limits. For example, if with your Mac Pro you wanted to upgrade to Lion you would have to install Snow Leopard first because the Lion download requires SL.
What happens if you don’t update your Mac?
No really, if you don’t do the updates, nothing happens. If you’re worried, don’t do them. You just miss out on new stuff they fix or add, or maybe on problems.
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Is it bad to not update your Mac?
The short answer is that if your Mac was released within the last five years, you should consider making the leap to High Sierra, though your mileage may vary in terms of performance. OS upgrades, which generally include more features than the previous version, are often more taxing on older, underpowered machines.