what is the best macOS for my iMac mid 2010
I having trouble updating to Sierra 13.0
Is there a better macOS than Sierra for this dinosaur iMac Mid 2010 27"
If so, any recs on how to install it?
iMac 27″, macOS 10.12
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High Sierra 10.13.6 is the best and also the latest possible. See the following from Identify your iMac model - Apple Support
iMac (27-inch, Mid 2010)
Model Identifier: iMac11,3
Part Number: MC510xx/A, MC511xx/A
Latest compatible operating system: macOS High Sierra 10.13.6
To upgrade to High Sierra, see: How to download macOS - Apple Support