When I boot and hold down option, I get two HDs to select from. Both are titled the same and both boot me to my OS. Is there a way to fix this?
Mac Pro, OS X Yosemite (10.10.1)
What are the two titles?
What is the title of your startup disk?
If you go to System Preferences>Startup disk what startup disks are available?
Do you have startup disks with the same title?
Do you see EFI when you hold Option key (some call it the EFI Boot Selector or Manager)?
EFI has been there and could be seen in TechTool Pro years ago, and after using Disk Warrior 4
Do you have two or more boot volumes? I assume yes.
Slide out all the drives but the one you want and what do you see?
Your hard drive that the system is on has partitions for EFI (UEFI) and is where boot volume pointer is stored.
You may have created a Fusion Drive.
Linc Davis on my thread! 😀 When I enter EFI, I only expect to see 'HD' and 'Recovery HD', but I see 'HD' and 'HD' and they both do the same thing. I have no recovery partition and two of the same boot selections.
With Yosemite, the Recovery partition does not show when you boot With Option key depressed unless you overtly made changes via terminal
Please post a screenshot of the Disk Utility window. Be careful not to include any private information.
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And lllaass?? You guys! I will post a screenshot in a couple hours. I am at work. Thank you for bearing with me.
Please let me know if there is anything else I can post.
What' on your 250GB Seagate?
Pull it out and try again.
I have reset the PRAM. There is nothing on the 250G. Last night, I went to boot from a linux USB and two EFI USBs showed up alongside 2 HDs.
It's not a huge deal. I'm just looking to clean up my Mac so it doesn't have so many rough edges in the software.
I would want to clean up SMC and NVRAM. NVRAM needs to be cleared and it could be coming from PCIe controller, or from USB keyboard, something, and NVRAM needs to be done from power off / cold start, not from restarting.
I had a keyboard once that was causing some "minor" annoyance and issues - got a cheap keyboard, left my Apple on the shelf for month and was able to use it again. But for me, even zapping PRAM/.NVRAM was not going like it normally would and taking too long. Found out drive bay #3 was an issue too.
I don't know whether this is a peculiarity of your model, but it doesn't seem to be causing a functional problem.
This causes no problem. This problem started on my MacBook Pro, then I restored a time machine backup to my new Mac Pro. The issue was migrated. So it is something that would've been backed up in the Time Machine.
Why two Boot HD in EFI
