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I cannot simply boot to an OS DVD/USB/etc. People ask me, "Why don't you like Macintosh?" Situations like this are exactly why.
How to reformat macbook air sierra install#
iso, decompressing it and doing an install from what I have read. I cannot erase partitions (it says it cannot un-mount the drive).Ĭan anyone give me some pointers on where to go from here? If I need to boot to an external disk, how do I get that? It's not like downloading an. This happens with either partition.ģ.) Go Online for Help: Please disperse, there's nothing to see here.Ĥ.) Disk Utility: Repair says everything is fine. I sign in with my Apple ID, it tries to sign in, then says 'This item is temporarily unavailable. There are 2 partitions, one is labeled Macintosh HD (44.84GB in size), another one is labeled disk0s4 it is 75.34GB. Here, there are 4 options:ġ.) Restore from Time Machine Backup: It searches but doesn't find anything.Ģ.) Re-install OS X: I get to the Mountain Lion 10.8 screen, agree to the terms then it asks me where I want to install it. I do that and get to an OS X Utilities menu. So I hold down the 'option' key and it boots to a recovery screen, asks me to join a wireless LAN, and click the 'recovery' hard drive icon. It boots to a b&w screen saying 'no boot device detected press any key'. It was here before either of us got here, and we just discovered it a few weeks ago.Īfter charging since it had been shut down since who knows when, I got it powered on. Boss says to me, he says, "Vince," he says, ".get this thing working so our Developers can test various things from OSX." My boss has no idea who the original owner was, nor do I. There was this MacBook Air (circa Mid-2011) in our storage cabinet.