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I am resetting my old Air 13 to factory setting.
I erased the disk but, when reinstalling its original osx 10 Yosemite... it's NOT AVAILABLE on my Apple Store account.
I'm stuck there.
Doesn't allow me to connect to icloud either.
It says that "can't establish a secure connection.
I'm lost.
You may have to try another method to start your Mac into recovery, that
allows it to connect directly to Apple and download installers that way:
"When you install macOS from Recovery, you get the current version
of the most recently installed macOS, with some exceptions.."
..You'd still be able to try & use downloadable installers from Apple;
versions that could be compatible to build year hardware, are there.
• How to get old versions of macOS - Apple Support
//support.apple.com/en-us/HT211683
Details change; however it is possible to install a new download of
vintage or newer macOS, on a new storage drive; and reformat it.
[Or make a bootable installer with separate drive from instructions.
And then use Terminal command line to try & make it work.]
Boot into recovery mode using Command + Option + R which should not require authenticating using an AppleID.
You will also likely need to change the date on the computer to some time in 2017 or perhaps even earlier since the certificate for the installer has probably expired. While booted to the installer launch the Terminal app from the Utilities menu and use the following command to set the date & time to Jan. 2, 2017 @ 11:33am (adjust the year if necessary):
date -u 0102113317
If there are no errors, then quit the Terminal app and select "Reinstall macOS" unless you are performing a clean install which will require you to first use Disk Utility to erase the drive before selecting the "Reinstall macOS" option.
FYI, if you can still boot the Mac, then I highly recommend you create a bootable macOS USB installer using the instructions in this Apple article:
How to create a bootable installer for macOS - Apple Support
If your Mac can run macOS 10.10, then it should be able to run macOS 10.11 as well. You should check to see whether your Mac is able to run an even newer version of macOS by using this article to see which versions of macOS are compatible with various Apple hardware:
https://eshop.macsales.com/guides/Mac_OS_X_Compatibility
If for some reason you need macOS 10.10 specifically, then here is a link to the installer. You can still create a bootable macOS 10.10 USB installer by following the directions for the 10.11 El Capitan and adjusting the command accordingly to reflect the difference in names.
How to get old versions of macOS - Apple Support
Best Results are via Ethernet Cable to Router
osx not available
