How do I do a clean Install on a an empty Hard Drive

I have MacBook Pro 17"-Late 2011 with a hard drive that has some bad blocks. Using "Recovery/Disk Utility" I erased the disk, hoping the bad blocks would be mapped and not used. I then tried to re-install OS X. It appeared to be downloading, but when I went back to it a few hours later, it was on the main screen and I could not find or initiate an installer. I tried again and this time it hung up when it got to 1 hour and 0 minutes left.


I booted up on an external clone. The internal hard drive is there and the partition I want is empty and seems ready for an install. I am trying to download the OS X installer directly from the Apple site, hoping that it will give me an opportunity to use the Installer to Install to the empty hard drive. I clicked Download and a timer started spinning in the upper left hand corner. This has been unchanging for about 8 hours. The word Download never changed to Downloading and I can't tell whether it is doing anything or just has hung.


I have an iMac running OS X 10.11.4 and running fine. I just went to the Apple site and downloaded the OS X Installer. It downloaded fairly quickly. It noted that I already had 10.11.4 installed, but said if I wanted to get the full installer to hit Continue. I did. The Installer seems to have installed, but is now asking me where I want it installed. I really don't want to install it here on anything in this computer. I just found the file "Install OS X El Capitan.app" in my Applications Folder. I stopped the Install and have the copy of the Installer app.


Can I turn this into an Install disk and then install it on my MacBook Pro with the disk? Can I do it on a Flashdrive?


Any suggestions would be appreciated.

iMac, OS X El Capitan (10.11.4), 12 GB Ram

Posted on Apr 3, 2016 6:45 AM

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4 replies

Apr 3, 2016 8:04 AM in response to PianomanDave

I went to the link at <https://support.apple.com/en-us/HT201372> for "Create a bootable installer of OS X".


I had an 8GB USBFlashdrive. I followed the procedures for how to make a bootable install disk.


Terminal initially erased the flash drive and renamed it "Install OS X El Capitan".It then went to a line that stated "copying installer files to disk..."

The "Install OS X El Capitan.app" is listed as 6.21 GB. If I double click the flash drive icon in List mode, it shows a single item called "Install Os X El Capitan.app" that is 391.4 MB. The window indicates there is 1 item and that there is 1.88GB available (from my 8GB flash drive).

The Terminal window just sits at

User uploaded file

Activity Monitor lists a Process SfntMonD as using 99.8%CPU and 10% WindowServer.

Are things working correctly and the other files are being loaded as invisible files of the installer?

Should I just wait until Terminal completes what it is doing and moves to the next message automatically?

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How do I do a clean Install on a an empty Hard Drive

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