Chosen Solution
My problem is quite similar to this thread: Stuck on grey screen after boot, Disk Utility says HD is OK however even using Disk Utility to try to start up, I get nowhere. Ditto re start up using my wifi network - I get about 5% along the progress bar, and then I get stuck. But according to Disk Utility, there’s nothing wrong with my hard drive. Prior to trying Disk Utility, with holding shift or shift+V or whatever, about 25% along the progress bar, and then that bar disappears. I have tried and failed with all the other tricks: safe mode, cmd+o+r+option, PRAM/NAVM etc. Nothing external was connected at the time, I had just been using it to surf. The only thing unusuak was Avast! picking up and quarantining a supposed threat to the laptop (presumed malware). But reading other threads, this doesn’t sound like the problem is related to malware. So essentially, Disk Utility says no hard-drive problems, but can’t load up AT ALL, using any method
Right you don’t have a HD problem you have an OS problem. You have a virus or corrupt/missing boot file. Try a Single User boot to force file check. (Command-S) It should boot to a black screen with scrolling white text… that text roll until it stops. When it does you will see At the some text about /sbin/fsck -fy when the cursor pauses blinking type: /sbin/fsck -fy (that is a single space between fsck and the -fy) Press Return. fsck will go through five “phases” and then return information about your disk’s use and fragmentation. Once it finishes, it’ll display this message if no issue is found: The volume (name_of_volume) appears to be OK If fsck found issues and has altered, repaired, or fixed anything, it will display this message: FILE SYSTEM WAS MODIFIED
Important: If this message appears, repeat the fsck command you typed in step 2 until fsck tells you that your volume appears to be OK (first-pass repairs may uncover additional issues, so this is a normal thing that happens). When fsck reports that your volume is OK, type reboot at the prompt and then press Return. At reboot if you see a dark elliptical progress bar that suddenly disappears and/or hear a tone DO NOTHING for a hour. Your EFI might be repairing itself. If you halt this process you can really screw things up (from some of your description you may have already don this). If thats the case only someone with a working Mac or an Apple Genius can help you. If this answer is acceptable please remember to return and mark it.
hi, im having problem too with my mac air. it suddenly went hanging , my cursor just stucked and i cant do anything to it even aftr pressing any keys. so i tried restarting it but then it got stucked on apple logo screen, then i tried to press the option+command+p+r keys but the screen keep on turning on and off with the chimes sound. what should i do? pls help .
