office need os 11, how to update my imac 27 2010mid?

Since the last operating system you can install on that iMac is High Sierra (10.13.6), that eliminates any new Microsoft Office installation. Since that Mac is creeping up on 13 years of age, you should consider a new or newer (Apple refurbish center) Mac that can run current operating systems.

If you choose to stay on your old hardware, and do have macOS 10.13.6 installed, then here are your options for an alternative MS Office (clone) solution:

LibreOffice v7.4.6:

• Last version to support macOS High Sierra
• No future updates
• Free
• Documentation

Softmaker Office 2021 for Mac:

• Currently supports macOS High Sierra 10.13.6 thru Ventura
  • A beta Office 2024 for Mac suite is in development and requires macOS Mojave or newer
    • Native Intel, M1 and M2 application binaries
    • Metal GPU support
• Native MIcrosoft document format support
• Paid software with free trial
• Documentation
• Can be installed on a thumb drive and used from that media instead of ordinary Mac installation

hanmeng69 Said:

"office need os 11, how to update my imac 27 2010mid?: need to install office on iMac 27"

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Contact Microsoft:

Microsoft is the Developer of Office. Ask them which version is required. Start Here: Microsoft Contact Us Virtual Agent - Microsoft Support. Important: Perform a chat session with Microsoft using a computer, as it would be more user-friendly doing so.

FYI, the newest macOS version that your iMac 27" mid-2010 can run is macOS 10.13.6 High Sierra, an OS that was more or less retired in 2020. Your Mac cannot run anything newer, including OS 11 Big Sur, OS 12 Monterey and OS 13 Ventura.

How can I perform any of these task if I can’t because I can’t start my computer

How do I perform any of these actions if I can’t even turn my computer on

I suggest you start a new topic & we try to figure that problem out first mu friend?