How do I install macOS sierra 10.12?

MRAL29 wrote:

How do I install macOS sierra 10.12?

If you can run Sierra you can run High Sierra 10.13

the older macOS installer backups on this server:

https://support.apple.com/en-gb/HT211683

verify you are using the Safari browser to download/initiate the macOS links.

You really should provide us with your MacBook Pro's sub-model and current OS verison. Some older MBPs cannot run Sierra.; newer ones can run better than Sierra.

You can find the sub-model and the current OS by doing "About this Mac..." from your Apple menu:

Os X El Capitan versos 10.11.6

Imac (Retina 5K-27 inches late 2015)

Processor 3.3G Hz Intel Core i5

Memory 32 GB 1867 MHZ DDR3

Start Up Disk Macintosh HD

Graphics AMD Radeon M395 2048M

Serial # 25***Q17

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