Latest MacOS for MacBook 2011

NurArifB wrote:

how to return the document in the left textbar?

https://discussions.apple.com/content/attachment/c528b4cf-c6e5-4f74-b744-c9dda32dd314

Is this a separate question—unrelated to the post...(?)

You are better off posting separate question for theses issues unrelated.

Finder>Preferences>Sidebar make changes here

NurArifB wrote:

I'm using a MacBook 2011 which is 13 inches, what MacOS can I use for the latest tier?

macOS 10.13 High Sierra - Technical Specifications:

https://support.apple.com/kb/SP765?locale=en_US

https://itunes.apple.com/us/app/macos-high-sierra/id1246284741?ls=1&mt=12

How to upgrade to macOS High Sierra

https://support.apple.com/en-us/HT208969

MacBook (Late 2009 or newer)

MacBook Pro (Mid 2010 or newer)

MacBook Air (Late 2010 or newer)

Mac mini (Mid 2010 or newer)

iMac (Late 2009 or newer)

Mac Pro (Mid 2010 or newer)

If your Mac isn't compatible with the latest macOS, you may still be

able to upgrade to an earlier macOS, such as macOS Catalina, Mojave,

High Sierra, Sierra or El Capitan.

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.