When I try to reinstall the macOS it keeps saying unable to.

Apple_help09 Said:

"When I try to reinstall the macOS it keeps saying unable to."

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Getting macOS to Work:

Connect this to Ethernet:

The first thing that comes to mind is that you keep losing the connection to Apple's server. So, try connecting with Ethernet. If you have no Ethernet port, then this is the adapter to use: The Belkin USB-C to Gigabit Ethernet Adapter - Apple

Apple_help09 wrote:

It wasn’t it was one I found on YouTube and it’s a Macbrook air 13

There are more than a dozen MacBook Air models with displays around 13”, from 2008 to 2023.

There’s a model number etched on the bottom in tiny print, as is the serial number.

The serial number can get more model info at:

Check Your Service and Support Coverage - Apple Support

For Recovery, try to boot Recovery with the Option-Command-R chord:

Mac startup key combinations - Apple Support

This page may be helpful: What to do before you sell, give away, trade in, or recycle your Mac - Apple Support

Was "the video" from Apple, and are you sure it applies to your model?

Hi Apple_help09,

If you wish to completely erase your Mac and start fresh, complete these steps. They assume that you have an Intel-based MacBook Air running macOS High Sierra.

1. Start up from macOS Recovery: hold down Command-R as you power on or restart your Mac. Release the keys when the Apple logo and a progress bar appear, or when a spinning globe appears. (In the latter case, select a Wi-Fi network if prompted.)
2. The macOS Utilities window should appear. Choose Disk Utility.
3. In Disk Utility, select View -> Show All Devices.
4. Select the top level of your internal drive (APPLE SSD or something similar) and choose Erase. Select these options, then choose Erase:
   1. Name: Macintosh HD
   2. Format: Mac OS Extended (Journaled)
   3. Scheme: GUID Partition Table
5. When the erase is complete, quit Disk Utility.
6. The macOS Utilities window should reappear. Choose Install macOS and follow the onscreen instructions.
7. If the macOS installer still cannot install macOS, please take a screenshot of the exact error screen(s) that appear. We might ask for additional diagnostic info to better understand why an error is still appearing.

is this a Video provided by Apple?

if not, its instructions are likely hopelessly out of date.

what model-year MacBook Air 13-in?