OS X Base System only disk available

I have the SAME problem! I followed all steps but it didn't work. When i hold down Command+r the globe doesn't came out ! Comes out the classic loading with Apple and opens the recovery mode

Genius!!!! After searching for help, the Mac finally worked with your step by step instructions!!!! Thank you sooooooo much!!!

To those stuck at the reboot and unable to install, the most important step was the comm-option-r and hold it. Had been doing comm-r and was stuck in the failed heart/brain-painful/frustrating loop.

Follow the step by step given earlier by kappy.. the Mac will reinstall.. which will like another 30 minutes.

Thank you again. It works!!!

Critical step::::;

1. To install the version of OS X that was currently installed use Command-Option-R

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2. To install the original factory version when the computer was new use Command-Option-Shift-R

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Do this:

1. Restart the computer. Immediately after the chime hold down the CommandandRkeys until the Apple logo appears. When the Utility Menu appears:
2. Select Disk Utility from the Utility Menu and click on Continue button.
3. When Disk Utility loads select the topmost (out-dented entry, usually disk ID and maker) from the Device list.
4. Click on the Erase icon in Disk Utility's main window. A panel will drop down.
5. Set the Format type to APFS for an SSD or Mac OS Extended (Journaled) for an HDD.
6. Click on the Apply button, then wait for the Done button to activate and click on it.
7. Quit Disk Utility and return to the Utility Menu.
8. Select Install OS X and click on the Continue button.

Internet Recovery for Qualified Mac Models

1. Restart the computer. Immediately after the chime hold down the (see Note below) keys until a globe appears.
2. The Utility Menu will appear in from 5-20 minutes. Be patient.
3. Select Disk Utility and click on the Continue button.
4. When Disk Utility loads select the drive (usually, the out-dented entry) from the side list.
5. Click on the Erase tab in Disk Utility's main window. A panel will drop down.
6. Set the partition scheme to GUID.
7. Set the Format type to Mac OS Extended (Journaled.)
8. Click on the Apply button, then click on the Done button when it activates.
9. Quit Disk Utility and return to the Utility Menu.
10. Select Reinstall OS X and click on the Continue button.

Note:

1. To install the version of OS X that was currently installed use Command-Option-R.

2. To install the original factory version when the computer was new use Command-Option-Shift-R.

In Disk Utility select the topmost entry, the disk itself, is partitioning available?

I suspect you are looking at the installer disk image that is part of the installation system. Have you tried restarting the computer to see if the installer will pick up and continue? If the installer does not continue then get yourself back into the Recovery HD. Click on the Install OS X option in the Utility Menu and click on the Continue button. You may be asked for your Apple ID and/or Admin password so have them handy.

You jumped in with your replies to the OP and stepping over an already ongoing discussion. I answered replies I saw directed towards me. However, at the end, I sent out a reply that I see went to you instead of the OP. I reckon I clicked the wrong "Reply" button. Honestly, I didn't pay any attention to what you were posting.

marcia.marchiori wrote:

OMG, thank you guys, it worked! So here was the problem: I was going to the "regular" recovery screen, instead of the Internet Recovery one. I was pressing the right buttons, but not for long enough (I would just press it and release real quick). Thanks!

Glad to hear that it worked, takes a while don't it. 🙂

Then you should try Internet Recovery.

Immediately after the chime sounds press and hold the command and r keys, keep them depressed until a spinning globe appears onscreen, when the boot (which will be long) completes go to Disk Utilities and check for changes. from start to end this is not fast, be patient.

Note:

1. To install the version of OS X that was currently installed use Command-Option-R.

2. To install the original factory version when the computer was new use Command-Option-Shift-R.

Isn't that what I said, but rather more succinctly and with less extraneous information?