MacBook Pro :: Doesn't Start - Shows A Prohibitory Sign
Jun 5, 2014
have a early 2011 MBP running OSX Mavericks. I use my mac everyday both at home and school. This morning when I opened the mac, the screen was frozen. I simply restarted the mac, and it doesn't go beyond showing a prohibitory sign. I have tried many things..Â
1. Restarted the mac, while holding the Option key (selected Recovery HD), after waiting for nearly 10 mins, the system loaded into recovery disk ( but the twist was, in the disk utility, my SSD was not found/shown)Â
2. Then thought the SSD was dead.. So asked the IT guy to see if he can retrieve the data (removed SSD out of the mac and he used an external hard drive enclosure and the SSD was instantly recognized, saved the data). Here I did two things
   A. First, asked my friend if I could mount his SSD in my Mac and see if the system starts. Even using a different SSD, my mac still showed the prohibitory sign.
   B. Then l installed my SSD into his Mac.. System booted as normal (basically it was all there, but on his Mac)Â
3. So ruled out that my SSD was faulty. Then using the internet based Apple Hardware Test (AHT), I found no troubles with any of the mac components.Â
At this point, I don't understand what is causing my Mac not to go beyond the prohibitory sign? Could it be something as silly as the internal hard drive cable or something more complicated as the logic board? In which case, they should have been detected during the AHT?Â
Info:
MacBook Pro (13-inch Early 2011), OS X Mavericks (10.9.3)
I've been trying to partition my drives and install Windows on my late 2012 imac. I last adjusted my partitions using disk utility and now receive the prohibitory sign on start-up and cannot boot up in safe mode; pram reset; type commands in single user mode. Running on Mavericks OS.
after about a week of using Snow Leopard, whenever I restart my mac, it starts up with a prohibitory sign, or a circle and a line through it. So then I have to reinstall Snow Leopard, and whenever I restart it after that, it always does it. But it won't do it if I restart it after a software update, specifically OS updates. This didn't fix it when 10.6.2 came out, and it's very frustrating. Anyone know what's wrong?
I have a black MacBook that I got about 2 years ago, running OS X 10.5. I had about 10 GB free space. It's been working fine until this unfortunate event. Let me explain.
I was recently working with my mac as usual (browsing the web, downloading torrents, reading an ebook, ect). I tried to load [URL] in firefox, when it froze. Nothing new, so I tried to open up force quit. Nothing I clicked on responded. It was frozen. I also heard some weird "tinking" noises from inside the machine that I had never heard before. So, I inferred I should force shut down. I held down the power button, and it turned off. I hit it again to turn it back on. I saw a grey screen and an apple and heard the"dinggggg" noise we've all come to love like usual. But, suddenly the apple changes to a circle with a line through it, which I've dubbed a stop sign. It just stays like this. I can turn it off, and try again and the same thing happens. I've tried it like 10 times. (I know, the definition of insanity is doing the same thing over and over but expecting different results.
This is getting my adrenaline pumping, and I can't figure out what to do. Should I reset the NVRAM and PRAM like Apple says? I'm at a loss. Right now I'm using my friend's computer (running Vista ugh) to type this.
I'm selling my old iMac and while cleaning the hard drive it froze. I forced shut down and when I turned it back on a circle with a diagonal came up initially, followed by flashes of that, a question mark and the apple symbol. Now it won't get past the grey screen and the flashing symbols. Â
Problem: I have a half-terabyte external harddrive by western digital. It's been working for about a year now, no problems ever. it's basically halfway filled with movies and music and stuff; however, recently, it's not being recognized by my macbook. It uses a mini USB to USB cable. I switched the cables and it still didn't come up.
When I plug it into the AC it lights up and looks like its searching to 'talk' with my macbook. It has always done this, then the light would become solid and it would show up on my desktop. I tried it on different computers as well and it still doesn't actually show up. All the computers I've tried notify me that a drive has been connected, but not recognized. I really really need it to be recognized or else I lost A LOT of information.
I went to upload a file to Mediafire, and when it redirected me to Finder, my hard drive was the default folder to pick the files from. However, it had a red minus sign on it and I have no clue what that means.
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I tried:
resetting PRAM, didn't help.
start from safe boot, still stuck with apple sign and spinning wheel.
boot from installation CD by holding either the "C" or "D" key, it would not start from the CD.
Curiously, I can start it in Windows and I am using Windows right now. Some threads said that it could be a hard drive problem, but if I am using Windows, does it mean that my hard drive is fine?
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my macbook pro froze so shut it down by holding the power button, now when i try to restart it i get a prohibited sign instead of the apple logo. any way to fix it?
When I start my macbook If I don't hold the options key it goes straight to an apple than circle with line through it. If I hold options key I get two hard drives one that says just hard drive one that says windows. Windows seems to work fine other than the missing drivers for the Ethernet, wireless airport, and a few others. I have tried everything. I for some reason cannot get to the mac side. It doesn't even show up and nothing relating to bootcamp shows up. I split the partitions 35G to windows the rest to "mac" side. I would be just as happy with installing the drivers if I could get them installed I know very little about Mac's and should have left well enough alone.
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