Can' boot into Mac OS

Question

Can' boot into Mac OS

I have installed Windows 7 OS on my macbook air using Bootcamp and USB drive. Now it can only start Windows OS. I have tried to boot into recovery mode but the loading bar only loads halfway. I tried to boot into safe mode by pressing shift but it just boots into Windows. When I try to boot into Mac by pressing option at start up, I get this error and loads into windows instead

http://i.imgur.com/MBtFqJl.jpg

I followed these 2 guides

http://www.howtogeek.com/186907/how-to-install-windows-on-a-mac-with-boot-camp/

http://thenextweb.com/lifehacks/2012/08/05/install-windows-7-boot-camp-no-optica l-drive/

I used daemon tools instead of roxio toast though

I appreciate any help

I'm pretty sure I updated to El Capitan before installing Windows

MacBook Air, iOS 9.0.2

Posted on Jan 14, 2016 8:03 PM

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Answer 1

Kappy

Level 10

362,017 points

Jan 14, 2016 8:32 PM in response to Katsuya245126

Reinstall El Capitan Without Erasing the Drive

Boot to the Recovery HD: Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears.

Repair the Hard Drive and Permissions: Upon startup select Disk Utility from the main menu. Repair the Hard Drive and Permissions as follows.

When the recovery menu appears select Disk Utility and press the Continue button. After Disk Utility loads select the indented Macintosh HD entry from the the left side list. Click on the First Aid button in the toolbar. Wait until the operation completes, then quit Disk Utility and return to the main menu.

Reinstall OS X: Select Reinstall OS X and click on the Continue button.

Note: You will need an active Internet connection. I suggest using Ethernet if possible because it is three times faster than wireless and more reliable.

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Answer 2

Jan 14, 2016 8:36 PM in response to Kappy

I tried that but it just goes to Windows

Recovery HDD might be corrupt

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Answer 3

Kappy

Level 10

362,017 points

Jan 14, 2016 8:41 PM in response to Katsuya245126

Then you need to repartition the entire drive back to a single volume:

Install OS X Using Network Recovery

Be sure you have backed up your files because the following procedure will remove everything from the hard drive.

Boot to the Network Recovery Server:

Restart the computer and after the chime press and hold down the COMMAND-OPTION- R keys until a globe appears on the screen. Wait patiently - 15-20 minutes - until the Recovery main menu appears.

Partition and Format the hard drive:

Select Disk Utility from the main menu and click on the Continue button.
After DU loads select your newly installed hard drive (this is the out-dented entry with the mfgr.'s ID and size) from the left side list. Click on the Partition tab in the DU main window.
Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Click on the Options button, set the partition scheme to GUID then click on the OK button. Set the format type to Mac OS Extended (Journaled.) Click on the Apply button and wait until the process has completed. Quit DU and return to the main menu.

Reinstall OS X: Select Reinstall OS X and click on the Continue button. Be sure to select the correct drive to use if you have more than one.

Note: You will need an active Internet connection. I suggest using Ethernet if possible because it is three times faster than wireless.

This should restore the version of OS X originally pre-installed on the computer.

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