Why does my mac erase the files without putting them in the trash

Two days ago i was about to erase a file, i did that moving it into the trash, suddenly it apear a message to put my password, now i can not do anything without putting the password, erasing, moving files etc
pleas help!!

Open Disk Utility and run thre Permissions Repair function.

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So you press the Power button to start up the machine, it goes through the startup process, the login window appears, and the machine sleeps before you can enter your password? Do I understand the problem correctly?
Is the battery fully charged? Is the LED on the MagSafe plug lit, and if so, is it green or orange?
If the adapter plug is not lit, rest the SMC:
http://support.apple.com/kb/HT3964
If it still doesn't light after that, troubleshoot the AC adapter:
http://support.apple.com/kb/TS1713
Post back with answers to the above questions and any results from the SMC reset or adapter troubleshooting.

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Buddhaguru wrote:
I know that Mac's don't have a roll back like PC's
They do. It's called Time Machine.
You need to reinstall all of your Apps. That should replace all of the support files you nuked.

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Do you NEED Airport and Ethernet on at the same time?
Like @PAHU said you can use Locations to set up a different connection and/or network when you only need the Wireless.
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I have the same problem, two of my external hard drives have been infected by the shortcut virus.
It's time and would be helpful if someone from Apple took the time to solve this question.
I'm wondering if all my Time Machine Backups are also going to be infected by the virus.
Who cares if its of PC or Mac origin: it's affecting Mac related material!
I cant open the films that I edited on Mac (using avid mc).
So far, the only link I've found to remove the malware using a Mac is this one:
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anybody?

Why does my Mac stay on the white screen when I turn it on?

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Take each of these steps that you haven't already tried. Stop when the problem is resolved.
Step 1
The first step in dealing with a boot failure is to secure your 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 your last backup, you can skip this step.
There are several ways to back up a Mac that is unable to boot. You need an external hard drive to hold the backup data.
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b. If you have access to a working Mac, and both it and the non-working Mac have FireWire or Thunderbolt ports, boot 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.
c. 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
Sometimes a boot failure can be resolved by resetting the NVRAM.
Step 3
If there's a built-in optical drive, a disc may be stuck in it. Follow these instructions to eject it.
Step 4
Press and hold the power button until the power shuts off. Disconnect all wired peripherals except those needed to boot, and remove all aftermarket expansion cards. Use a different keyboard and/or mouse, if those devices are wired. If you can boot 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.
If you've booted from an external storage device, make sure that your internal boot volume is selected in the Startup Disk pane of System Preferences.
Step 5
Boot in safe mode. Note: If FileVault is enabled on some models, or if a firmware password is set, or if the boot volume is a software RAID, you can’t do this. Post for further instructions.
Safe mode is much slower to boot 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 your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
When you boot 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, your boot volume is corrupt and the drive is probably malfunctioning. In that case, go to Step 6.
If you can boot and log in now, empty the Trash, and then open the Finder Info window on your boot 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 reboot as usual (i.e., not in safe mode.)
If the boot process hangs again, the problem is likely caused by a third-party system modification that you installed. Post for further instructions.
Step 6
Launch Disk Utility in Recovery mode (see Step 1.) Select your 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 reboot as usual.
Step 7
Reinstall the OS. If your Mac was upgraded from an older version of OS X, you’ll need the Apple ID and password you used to upgrade.
Step 8
Repeat Step 6, but this time erase the boot volume in Disk Utility before installing. The system should automatically reboot into the Setup Assistant. Follow the prompts to transfer your data from a Time Machine or other backup.
Step 9
This step applies only to older Macs (not current models) that have a logic-board ("PRAM") battery. 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 boot 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 10
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.

WHY DOES MY MAC BOOK PRO SHUT OFF ON ME? SO FAR THE INFO I GOT 4 IT IS A MAC OS X VERSION 10.7.3 THE PROCESSOR IS 2.4 GHZ INTEL CORE 2 DUO MEMORY IS 2 GB 667MHZ DDR2 SDRAM I DON'T KNOW HOW OLD IT IS BECAUSE I BOUGHT IT USED SORRY I HOPE THIS HELPS THANK Y

WHY DOES MY MAC BOOK PRO SHUT OFF ON ME? SO FAR THE INFO I GOT 4 IT IS A MAC OS X VERSION 10.7.3 THE PROCESSOR IS 2.4 GHZ INTEL CORE 2 DUO MEMORY IS 2 GB 667MHZ DDR2 SDRAM I DON'T KNOW HOW OLD IT IS BECAUSE I BOUGHT IT USED SORRY I HOPE THIS HELPS THANK YOU

Sounds to me like you may have gotten a machine with hardware issues, but it's hard to say. It will shut down if it gets too hot, but that's not a normal occurrence. I have never seen a MacBook Pro shut down due to heat, even after lengthy 3D gaming sessions where the fans are running fast and the bottom of the machine is unpleasant to touch.
First thing I would try to do is reset the SMC. If that doesn't help, erase the hard drive and reinstall the system from scratch, which you should always do with a used machine anyway.
If a fresh system doesn't help, you'll need to get it checked out by Apple.
Edit: Oh, and sig is absolutely right... please don't post in all caps! It's very irritating.

Why does OS X change the permissions without my intervention?

I work on various documents at home, where I have a Mac. and at work where I have a Windows box. In order to do this, I use Google Drive as my cloud storage to save the documents.
Now when I edit a Word doc in MS Word at Work, then save it to the Google Drive, I am able to open it on my Mac in MS Word for Mac, just fine.
However, when I edit the Word doc on my Mac, and save it to Google Drive, the sytem automatically sets the "everyone" permission to "no access". This is incredbily annoying. I have to go and reset the permission everytime to "Read and Write" in order to edit it the next day at work on my Windows bos.
Why does OS X change the permission of the document when I don't want it to! I want the file to ALWAYS be read and write FOR everyone PERIOD. Yet it seems to have a mind of its own and changes it.
How can this be fixed... this doesn't even make sense!

korkyk --
Could it be that it is a function of Google Drive? I share Word docs with Mac & PC Users all the time with no permissions errors or any other problems. My husband and I share docs all the time between PC and Mac. Again no problem. But we do not put Google Drive in the middle.

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Sorry, it's because Firefox 4+ are only compiled for the Intel processors.
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http://www.floodgap.com/software/tenfourfox/

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Work computer is authorized...

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Regards.
Message was edited by: Dave Sawyer

Why does my mac erase the files without putting them in the trash

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