Mac OS X 10.13 High Sierra Full OS Install Reinstall/Recovery Upgrade Downgrade.
Mac OS X 10.13 High Sierra Full OS Install Reinstall/Recovery Upgrade Downgrade.. Mac OS X 10.13 High Sierra Full OS Install - For unibody Aluminum models, Not for older plastic models. This won't load on Mac computer with EFI firmware lock - If computer shows a lock pad on screen when restart and hold "Option" Key, that is EFI firmware lock and its motherboard must be fixed first before any OS X installation can take place.. Condition:: New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is applicable). Packaging should be the same as what is found in a retail store, unless the item is handmade or was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag. See the seller's listing for full details. See all condition definitions : MPN: : Does Not Apply , Brand: : Unbranded: UPC: : Does not apply .

