My imac is not starting up

I trashed my system folder accidentally, when I took some loose folders that end up in my hardrive to the trash. When I attempted to rescue the "system" folder out of the trash, the folder started to copy to the desktop but never finalize. I realize perhaps I should have drag the syst. folder back into the hardrive. No the Imac G5 is not finishing the start up process & it doesn't pass a gray screen in different languages. Please help. Thanks so much.

Reinstall the operating system with the original disks that came with the imac. If you have data that's important on the mac that is not backed up you could do archive and install of the the operating system.

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IMac will not start-up, do not have a backup, any way to back it up before erasing the drive?

Our iMac will not start up, it goes to the flashing question mark screen. I have tried the different steps listed at http://support.apple.com/kb/TS1440, but they have not worked, as it says the disk is not repairable. It says I need to erase the disk and reinstall OS X. However, I do not currently have a back-up of the hard drive, so is there any way I can back it up before erasing and reinstalling, even though the iMac will not start up? Thanks.

I also tried downloading Snow Leopard onto an external hard drive and boot from there, but it just comes up to the choose a language screen everytime.

My imac does not start anymore (stops at the screen with the apple and a rotating circle). An idea what I could try to make it start again?

My Imac does not start anymore.
==> What I have already done:
1) I tried with the tigger dvd to reinstall. It didn't succeed.
2) Via the single mode, when starting I got the message "disk0s2: I/0 error" several times. After that I got "Root device is mounted read-only"
3) Nevertheless, I tried the "fsck -yf" function. After checking "Journal HFS Plus volume", "extends overflow file", "catalog file"... and invalid record count
==> /dev/rdisk0s2 (hfs) EXITED WITH SIGNAL 8
Can someone advices me? I red on the internet I could reformat the disk... loosing all the data I didn't backed up. How am I suppose to reformat?
Thanks in advance,
Fred

Reset the SMC: http://support.apple.com/kb/HT3964
Reset the PRAM: http://docs.info.apple.com/article.html?path=Mac/10.6/en/26871.html
Restart the computer while holding down your mouse button which if you hold it down long enough (5 minutes at most) should eject the disk
If the disk still doesn't come out at that point then you need hardware evaluation;
contact Apple, contact an Apple Authorized Service Provider, or make an appointment with an Apple Retail Store.

My imac will not start - it is hunged up, when I turn it on I see the apple and the little wheel go around and around and nothing happens - what can I do ???

Hello - can anybody help me - my Imac will not start - When I try to start it I just get to see the apple and the wheel that goes around and around HELP !!

Restart in Safe Mode, this will clear some caches. How you do this is when you hear the startup tone hold down the Shift Key until you see the progress bar appear. Let it fully boot, then open System Preferences - Startup Disk and ensure your internal HD is selected and then click Restart to test. If you still don't have luck you should run Apple Hardware Test in Extended Mode, you may need to run the test 2-3 times to report any errors. To run AHT you will need teh ORIGINAL Install Discs that shipped with the computer. Instructions for AHT are in:
http://support.apple.com/kb/HT1509
Have you been backiing up?

HT1751 imac does not start becouse cd i burn fast need help

imac does not start becouse cd i burn fast need help

andres:
Running Repair Disk from your install disk as suggested by neuroanatomist is the best first step. I have outlined the procedure in detail below, with suggestions for what to do if DU reports errors it cannot repair:
Repair Disk
Insert Installer disk and Restart, holding down the "C" key until grey Apple appears.
Go to Installer menu (Panther and earlier) or Utilities menu (Tiger) and launch Disk Utility.
Select your HDD (manufacturer ID) in the left panel.
Select First Aid in the Main panel.
(Check S.M.A.R.T Status of HDD at the bottom of right panel, and report if it says anything but Verified)
Click Repair Disk on the bottom right.
If DU reports disk does not need repairs quit DU and restart.
If DU reports errors Repair again and again until DU reports disk is repaired.
If DU reports errors it cannot repair you will need to use a utility like Tech Tool Pro or Disk Warrior
What’s a kernel panic may help you identify the black screen you saw earlier. If it does, post back and let us know.
Good luck.
cornelius

My Imac does not start and make a terrible noise like an alert.

Please help me, my Imac does not start and make a terrible noise like an alert when try to start ,the Imac keep a grey screen when try to start and keep there.

Sounds like it is time to take it to an Apple Store or AASP to be serviced. You can also try troubleshooting using Apple's Gray screen appears during startup instructions.

My iMac does not start.

My iMac does not start. When I turn it on, it stays loading in the half and doesn't continue. Some days before I had updated my iMac to Yosemite 10.10. Everything was ok but yesterday I decided tu reboot it and when it was turning on this happened, it kept stuck at the middle of the bar. I have the latest model of MacBook Air '13.

Take each of these steps that you haven't already tried. Stop when the problem is resolved.
To restart an unresponsive computer, press and hold the power button for a few seconds until the power shuts off, then release, wait a few more seconds, and press it again briefly.
Step 1
The first step in dealing with a startup failure is to secure the data. If you want to preserve the contents of the startup drive, and you don't already have at least one current backup, you must try to back up now, before you do anything else. It may or may not be possible. If you don't care about the data that has changed since the last backup, you can skip this step.
There are several ways to back up a Mac that is unable to start. You need an external hard drive to hold the backup data.
a. Start up from the Recovery partition, or from a local Time Machine backup volume (option key at startup.) When the OS X Utilities screen appears, launch Disk Utility and follow the instructions in this support article, under “Instructions for backing up to an external hard disk via Disk Utility.” The article refers to starting up from a DVD, but the procedure in Recovery mode is the same. You don't need a DVD if you're running OS X 10.7 or later.
b. If Step 1a fails because of disk errors, and no other Mac is available, then you may be able to salvage some of your files by copying them in the Finder. If you already have an external drive with OS X installed, start up from it. Otherwise, if you have Internet access, follow the instructions on this page to prepare the external drive and install OS X on it. You'll use the Recovery installer, rather than downloading it from the App Store.
c. If you have access to a working Mac, and both it and the non-working Mac have FireWire or Thunderbolt ports, start the non-working Mac in target disk mode. Use the working Mac to copy the data to another drive. This technique won't work with USB, Ethernet, Wi-Fi, or Bluetooth.
d. If the internal drive of the non-working Mac is user-replaceable, remove it and mount it in an external enclosure or drive dock. Use another Mac to copy the data.
Step 2
If the startup process stops at a blank gray screen with no Apple logo or spinning "daisy wheel," then the startup volume may be full. If you had previously seen warnings of low disk space, this is almost certainly the case. You might be able to start up in safe mode even though you can't start up normally. Otherwise, start up from an external drive, or else use the technique in Step 1b, 1c, or 1d to mount the internal drive and delete some files. According to Apple documentation, you need at least 9 GB of available space on the startup volume (as shown in the Finder Info window) for normal operation.
Step 3
Sometimes a startup failure can be resolved by resetting the NVRAM.
Step 4
If a desktop Mac hangs at a plain gray screen with a movable cursor, the keyboard may not be recognized. Press and hold the button on the side of an Apple wireless keyboard to make it discoverable. If need be, replace or recharge the batteries. If you're using a USB keyboard connected to a hub, connect it to a built-in port.
Step 5
If there's a built-in optical drive, a disc may be stuck in it. Follow these instructions to eject it.
Step 6
Press and hold the power button until the power shuts off. Disconnect all wired peripherals except those needed to start up, and remove all aftermarket expansion cards. Use a different keyboard and/or mouse, if those devices are wired. If you can start up now, one of the devices you disconnected, or a combination of them, is causing the problem. Finding out which one is a process of elimination.
Step 7
If you've started from an external storage device, make sure that the internal startup volume is selected in the Startup Disk pane of System Preferences.
Start up in safe mode. Note: If FileVault is enabled in OS X 10.9 or earlier, or if a firmware password is set, or if the startup volume is a software RAID, you can’t do this. Post for further instructions.
Safe mode is much slower to start and run than normal, and some things won’t work at all, including wireless networking on certain Macs.
The login screen appears even if you usually log in automatically. You must know the login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
When you start up in safe mode, it's normal to see a dark gray progress bar on a light gray background. If the progress bar gets stuck for more than a few minutes, or if the system shuts down automatically while the progress bar is displayed, the startup volume is corrupt and the drive is probably malfunctioning. In that case, go to Step 11. If you ever have another problem with the drive, replace it immediately.
If you can start and log in in safe mode, empty the Trash, and then open the Finder Info window on the startup volume ("Macintosh HD," unless you gave it a different name.) Check that you have at least 9 GB of available space, as shown in the window. If you don't, copy as many files as necessary to another volume (not another folder on the same volume) and delete the originals. Deletion isn't complete until you empty the Trash again. Do this until the available space is more than 9 GB. Then restart as usual (i.e., not in safe mode.)
If the startup process hangs again, the problem is likely caused by a third-party system modification that you installed. Post for further instructions.
Step 8
Launch Disk Utility in Recovery mode (see Step 1.) Select the startup volume, then run Repair Disk. If any problems are found, repeat until clear. If Disk Utility reports that the volume can't be repaired, the drive has malfunctioned and should be replaced. You might choose to tolerate one such malfunction in the life of the drive. In that case, erase the volume and restore from a backup. If the same thing ever happens again, replace the drive immediately.
This is one of the rare situations in which you should also run Repair Permissions, ignoring the false warnings it may produce. Look for the line "Permissions repair complete" at the end of the output. Then restart as usual.
Step 9
If the startup device is an aftermarket SSD, it may need a firmware update and/or a forced "garbage collection." Instructions for doing this with a Crucial-branded SSD were posted here. Some of those instructions may apply to other brands of SSD, but you should check with the vendor's tech support.
Step 10
Reinstall the OS. If the Mac was upgraded from an older version of OS X, you’ll need the Apple ID and password you used to upgrade.
Step 11
Do as in Step 9, but this time erase the startup volume in Disk Utility before installing. The system should automatically restart into the Setup Assistant. Follow the prompts to transfer the data from a Time Machine or other backup.
Step 12
This step applies only to models that have a logic-board ("PRAM") battery: all Mac Pro's and some others (not current models.) Both desktop and portable Macs used to have such a battery. The logic-board battery, if there is one, is separate from the main battery of a portable. A dead logic-board battery can cause a startup failure. Typically the failure will be preceded by loss of the settings for the startup disk and system clock. See the user manual for replacement instructions. You may have to take the machine to a service provider to have the battery replaced.
Step 13
If you get this far, you're probably dealing with a hardware fault. Make a "Genius" appointment at an Apple Store, or go to another authorized service provider.

My imac does not start up

My imac does not start up. It shows a white page with apple sign .

Resetting NVRAM / PRAM
Shut down your Mac.
Locate the following keys on the keyboard: Command (⌘), Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.

My iMac does not start up as usual. Start up disk is full message and I do not get normal desk top. Please can you help? Thanks

My iMac does not start up as usual. I now get a ' start up disk is full. You need to make space available on your start up disk by deleting files' message.
I am able to key my log on password however I just get the purple galaxy screen with no desktop.
If I try to use the keyboard I get a tone when pressing the keys.
Has worked perfectly well up until I got this dusk full message.
Can anyone help please. Thanks

Your going to have to follow the Data Recovery Efforts page here to be able to access your drive and remove files without booting the computer.
You can't open the iMac so you will need OS X booted from a external drive or via Firewire Target Disk Mode using another Mac.
https://discussions.apple.com/docs/DOC-3172
I would concentrate on Movies as this is a big source of large files to free up room.
Read Storage Drive here
https://discussions.apple.com/docs/DOC-3045
If you not handy with computers, your going to have to hire a local service or provide the info above to someone you know who can, it's not easy.

My imac does not start and asks for bootdisk

i bought a new imac and connected it with internet to upgrade the drivers. Power went off... and now imac does not start.
When it starts it asks for the boot disk and no boot disk came up with my mac.
Please help how can i reinstall mac.
thanks

None of the options work. I press the power on button keeping the option and R button pressed but the only option that appears is
First blank white screen appears as soon as i power on (option R is pressed) and then the following message
No bootable Device -- Insert boot disk and press any key
(Ethernet cable is connected but it does not go for internet recovery either)
No more activity.
Also if you can guide from where I can download OS X Lion for reinstalling it to the imac, please.
Does every mac come with a restore/bootable disk or not? We ordered two macs but did not get any disk with any of them.
Anxiously waiting for help....

Imac will not start up... wheels keep spinnin then shut off..

My imac does not start up. I tried resetting the PRAM, PNUM, all of that stuff and to no avail. What happens is the grey apple screen comes on, the wheels start spinning, then it just shuts off. I got the tiger disk in there and I press control/command s and it brings me to a blue screen that show my HD and the start up disk. I cannot select the start up disk for the life me. My mouse won't move over, nothing. When my mac was working, I couildnt delete some files that were in my trash and I went to my terminal and enter the command to start in safe mode, because I was having a problem manually starting in safe mode. But the problem is I think I have/got some sort of virus that is attacking my safe mode, because safe mode never ever kicked on. So now my computer is simply gone...HELP>>>>>>>
Doobs

First off, you have the keystrokes wrong.
Command-S will startup in single user mode, and can be used to repair the directory if the machine has enough free hard disk space. See my FAQ*:
http://www.macmaps.com/directoryfaq.html
Shift key will startup safe mode so you can startup without any drivers running.
Control-Command-S will do nothing.
Option can be used to startup the optical disc with the startup manager:
http://docs.info.apple.com/article.html?artnum=106178
There are no Mac OS X viruses out there. Is your data backed up?
Have you checked your free space*:
http://www.macmaps.com/diskfull.html
And has the clock battery been replaced in the last 4 years?
PNUM is not an acronym dealing with Macs, though PRAM is.
- * Links to my pages may give me compensation.
Message was edited by: a brody
Message was edited by: a brody

IMac will not start following OS X 10.9.4 update - takes 30 minutes to load and then turns off

iMac will not start following OS X 10.9.4 update - takes 30 minutes to load with spinning wheel and progress bar and then when it appears to be finished it powers off?

Thanks for the suggestion - this was the 1st thing I tried but it does not appear to work either. I'm still getting the 30 minute spinning wheel and slow moving progress bar on a grey background - even if I try to start the iMac in 'safe' mode!

My Imac will not start up. What do I do??

My imac will not start up. I have shut it down and turned it on but it will not come up. What do I do?

Take a look at > Troubleshooting: My computer won't turn on

G4 iMac will not start normally

My wife's G4 iMac will not start normally. I have used the procedures from http://docs.info.apple.com/article.html?artnum=107393 and the "Disk Utility" on http://docs.info.apple.com/article.html?artnum=106214 to no avail.
When trying to start, a message comes up saying that the computer must be rebooted. Trying to boot in "Safe Mode" fails after an hour and shuts down the computer, and the "Disk Utility" runs for an hour or two and then gives a message that it was unable to repair the "minor error" on the hard-drive.
After force starting the iMac by holding the power button until the command line appears, I tried running fsck, but the commands are unrecognized. However, if I type in "mac-boot" at the command prompt, the iMac will start. I have copied all of my wife's photos, movies and music, and Word and Excel documents, etc. to my XP PC's hard-drive using USB flash drives.
My question is two-fold:
#1. I have heard that "Disc Warrior" is excellent at resolving hard-drive errors. Can anyone comment on "Disc Warrior" and is there anything else out there that someone can recommend?
#2. I bought RAM to bring the total up to one gig, so I was thinking of upgrading the hard-drive and installing Tiger on the new and larger drive while in the "Ball" changing the RAM. What is the maximum capacity hard-drive I can put into the G4 800mhz iMac without any problems and is there any particular model hard-drive that seems to work best?

I tried reading the link that you posted http://www.thexlab.com/faqs/kernelpanics.html but I don't have a disk with the "Apple Hardware Test".
Since I made the post that you replied to, things have gotten worse. I can no longer get onto the internal hard-drive. I have tried many different methods including the methods written about in the linked article you supplied. I can get onto the Installation CD and I can run "Disk Utility" from the CD. I have repaired the file permissions, but when I run "Repair Disk", it runs for about two hours and then suspends operations with a dialog box stating, "First Aid failed. Disk Utility stopped repairing Volume because the following error was encountered: The underlying task reported failure on exit." and then in the progress box after the list of addresses, there is a message:
(in red) Incorrect number of thread records
Invalid leaf record count
Invalid Map Node
Invalid directory Item Count
Invalid directory Item Count
Invalid volume directory Count
Invalid volume file Count
Volume Bit Map needs minor repair
Invalid volume free block count
Volume header needs minor repair
(in green) repairing volume
(in red) The volume could not be repaired
Error: The underlying task reported failure on exit
(in black) 1 HFS volume checked.
(in red) 1 volume could not be repaired because of an error
(in black) repair attempted on 1 volume
(in red) 1 volume could not be repaired.
I recently bought the 1/2gb replaceable RAM and the 1/2gb "Hidden" or "Factory Installed" RAM. I was planning on installing them soon. Since the "Disk Utility" is telling me that there are faults on the internal hard-drive and I have to go into the "Ball" to replace the "Hidden" or "Factory Installed" RAM, I figured that I might as well replace the hard-drive and redo the system.
Unless someone comes up with something I can do which will not cost me much money, I figure that I might as well install the RAM and a 120gb Western Digital Hard-drive that is about a year old, but was only used for a few days in an XP PC. Will the 120gb drive be recognized? I was thinking of partitioning it as 80gb and 40gb partitions. Does that sound good? I would install the OS on both partitions so that I could always boot if there was a failure.

IMac will not start up - blue screen after months of Leopard use

I have an iMac G5 that will not start up. It hangs at the blue screen, but does not have the issue with the ApplicationEnhancer.bundle file. It will start up in safe mode.
This iMac will not start from a bootable external drive (the external drive can be used as a start up disk successfully with my iBook G4). The iMac's internal drive can be used as a start up disk for the iBook (via the target mode) and does not appear to have any problems. Does this seem like it is a hardware issue with the iMac? The iMac also hangs at the blue screen if I attempt to start up with the Leopard install disk after using the startup disk preference pane in safe start mode.
I have repaired permissions, verified the disk, etc., using the disk utility. I have cleared caches, preferences, and so on, using Mac HelpMate.

It may be that some of your login items might be incompatible with the mac. Also, try booting up from the install disk and repair your disk.

Please help my iMac will not start. The apple logo comes up and the wheel goes round and then I am left with an empty white sceen can anyone help

Please help, my iMac will not start up, the apple comes up and the wheel goes round but then I am left with a blank white screen. Has anyone any ideas.

Locate your original install disk (it's grey) and use it to restart your iMac by holding the "C" key during startup. Use the disk utility to repair your harddrive.

My imac is not starting up

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