Disk Not Showing Up in Startup Disk

I have a mid-2011 MacBook Pro with two partitions on the internal hard drive. One has 10.8.5. One has 10.6.8. When I boot from the 10.6.8 Snow Leopard disk the partition with 10.8.5 no longer shows up as a bootable volume in System Preferences>Startu

Just updated a 15" Retina to 10.8.3 and also ran the SMC 1.1 update. Now my bootcamp windows partition does not show up in the Startup Disk any more. I can see it in the Finder and I can reboot and hold down option key to boot into Windows, but for s

So after i've upgrade my macbook to Yosemite, bootcamp window won't show up when i hold on to 'alt' key during the start up. The bootcamp window also doesn't shows up in the startup disk in system preferences. Tried removing windows 7 and re-install

My macbook pro died on me, since it has stopped going into safe sleep (hibernate). Only this time I couldnt start it up again, it only gave me the question mark. When I start up from the CD and check the drive with Disk Utility everything is ok. But

I have had several kernel panics on my iBook G4; the panic message shows up just after the desktop appears. Although the startup volume shows up in Startup Disk, the installation disk reports an error when I attempt an erase and install. Disk utility

Hey everyone, First time posting here so forgive any mistakes. I recently purchased a Late 2013 Macbook Pro Retina, 15-inch, 2.6 GHz Intel Core i7 from Apple. Previously, I had the late 2007 Macbook Pro model until a friend spilled some water on it a

Hey all, Today I resized my OSX partition with the intention of leaving it blank for my new SSD to use as over provisioning space. This resulted in me having 5 partitions on the drive for a short while (which may have caused the issue?). Hereafter, t

I'm running 10.4.11 on an iMac with one internal drive. I have 2 external firewire drives connected both with boot partitions running 10.3.8 so I can use NetRestore to clone our lab. The problem is that when I select "startup disk" from the syst

Installed Windows 7 via bootcamp but now when I boot my rMBP, it goes straight into Windows 7 rather than OS X Mavericks. I went into System Preferences > Startup Disk to change the boot drive but my Macintosh HD isn't listed. Screen shot located bel

OK, Boot Camp finished making a partition for windows on my SSD (I gave it 30GB), and it restarded my computer. I pressed the alt key so i could chosse the windows drive so i could begin the installation, BUT the option to open the windows drive was

I messed up, I changed my "Wheel group" properties to No Access ( or something other than the default) at the top level of my startup disk "Macintosh HD".   Now my computer won't start up, I just get the spinning wheel of death.    I a

Hi My HP Pocket Media Drive (USB), when plugged into my MacBook, does not show up on the Finder, even though it shows up on System Profiler. It only shows up on Disk Utility in certain occasions (such as after shutting down and starting up again). I

1TB WD external hard drive is not showing in finder sidebar, destop, or disk utility. I have checked and all the preferences are ticked. The disk itself is showing a light and making a whirring sound during start up after being plugged into the power

I'm in the process of selling my mac mini. I went to the disk utility and erased per the instructions here: http://support.apple.com/en-us/HT201065 The only thing I did differently was I adjusted the security settings to do a pass of writing zeroes. 

Greetings, I am having an issue with my AEBS/USB Disk showing up, well specifically the Volume. On the Macs when plugged in the Disk shows up just fine, checks out as OK with Disk Utility and looks pretty much identical to another disk that works fin

I have backed up my Snow Leopard with Time Machine and I'm trying to import my stuff into Lion using Migration Assistant. However, my Time Machine disk is not showing up in Migration Assistant even though it's connected and shows in Finder. Any idea

I'm sharing a disk drive on a Mac Mini. I can see it listed and access it on from one laptop, but it's no longer visible from my MacBook Pro. It was there yesterday, but I went on standby with it still connected, and there were messages about it bein

Hey guys, So I have a 1 Tb Lacie harddrive that has 3 partitions. 1 small one for windows transfers, 1 mac formatted disk and 1 dedicated to Time Machine. I back up everything except the Movies and Downloads folders. I have a new imac at my disposal

I've recently bought the Airport Extreme, I was all excited about Airport Disk but there is a weird, extremly annoying bug. On my USB hard drive connected using Airport Disk, I have a folder called music. When I open this folder, OS X starts reading

I have a wd 2tb external hard drive and a seagate 1tb external hard drive, - both os journaled formatted - both have an independent power supply - both show up when independently plugged into my mackbook pro and airport extreme I have a self powered