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
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