Mac Startup Disc Keeps Reverting to Windows

I have a Mac Mini with bootcamp installed and Windows XP installed on my bootcamp partition.
In the Mac startup disc settings, I have MacOS selected as the startup disc. Even so, my machine will periodically boot into Windows XP even though I have not changed the startup disc. When this happens, in Windows I go to the Bootcamp console, select MacOS as the startup disc, restart the computer and it boots into MacOs. Within about four or five days, however, the system AGAIN reverts to Windows XP on bootup BY ITSELF. Has anyone had this problem?

More of a workaround than a solution - But when I used Boot Camp for Windows before switching to Parallels, I would occasionally get the same problem (although randomly) and I just became used to holding down the option key at startup and pressing enter after a few seconds so that I guaranteed the Mac would boot up to OS X.
Maybe try repairing disk permissions from Disk Utility? If Boot Camp has any .plist or similar files (not sure) you might want to try trashing those too.

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MAC startup disc has no more space available for application memory.

I have a new mac, very little memory being used, and only a few programs being run...safari, i-tunes, etc. This error window keeps coming up "Your Mac OS X Start up disc has no more space available for application memory. To aviod problems, quit any applications and close windows you are not using. removing files you are not using from your start up disc will help". This window will come up with only finder and safari running, no other applications running. This has been going on for several weeks now off and on. What is causing this and what can I do?

I've had safari, mail and itunes open for a bit this afternoon. Terminal is showing (0) pages in and (0) pages out. I'll continue to keep them open and see what happens and report back if it changes! Here's the rest of the data showing at this time.
Processes: 49 total, 5 running, 44 sleeping, 260 threads 16:02:59
Load Avg: 0.07, 0.20, 0.16 CPU usage: 1.44% user, 2.65% sys, 95.90% idle
SharedLibs: 7052K resident, 10M data, 0B linkedit.
MemRegions: 18435 total, 501M resident, 15M private, 564M shared.
PhysMem: 817M wired, 803M active, 265M inactive, 1886M used, 2206M free.
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Keep getting a popup window stating" startup disc almost full, need to delete files"

keep getting a popup window stating" startup disc almost full, need to delete files", what can i do to help with this, i generally have only photos in iphoto, some imovies, and a small amount of documents

You should never, EVER let a conputer hard drive get completely full, EVER!
With Macs and OS X, you shouldn't let the hard drive get below 15 GBs or less of free data space.
If it does, it's time for some hard drive housecleaning.
Follow some of my tips for cleaning out, deleting and archiving data from your Mac's internal hard drive.
Have you emptied your iMac's Trash icon in the Dock?
If you use iPhoto, iPhoto has its own trash that needs to be emptied, also.
If you store images in other locations other than iPhoto, then you will have to weed through these to determine what to archive and what to delete.
If you use Apple Mail app, Apple Mail also has its own trash area that needs to be emptied, too!
Delete any old or no longer needed emails and/or archive to disc, flash drives or external hard drive, older emails you want to save.
Look through your other Mailboxes and other Mail categories to see If there is other mail you can archive and/or delete.
Other things you can do to gain space.
Once you have around 15 GBs regained, do a search, download and install OmniDisk Sweeper.
This app will help you locate files that you can move/archive and/or delete from your system.
STAY AWAY FROM DELETING ANY FILES FROM OS X SYSTEM FOLDER!
Look through your Documents folder and delete any type of old useless type files like "Read Me" type files.
Again, archive to disc, flash drives, ext. hard drives or delete any old documents you no longer use or immediately need.
Look in your Applications folder, if you have applications you haven't used in a long time, if the app doesn't have a dedicated uninstaller, then you can simply drag it into the OS X Trash icon. IF the application has an uninstaller app, then use it to completely delete the app from your Mac.
Download an app called OnyX for your version of OS X.
When you install and launch it, let it do its initial automatic tests, then go to the cleaning and maintenance tabs and run the maintenance tabs that let OnyX clean out all web browser cache files, web browser histories, system cache files, delete old error log files.
Typically, iTunes and iPhoto libraries are the biggest users of HD space.
move these files/data off of your internal drive to the external hard drive and deleted off of the internal hard drive.
If you have any other large folders of personal data or projects, these should be archived or moved, also, to the optical discs, flash drives or external hard drive and then either archived to disc and/or deleted off your internal hard drive.
Good Luck!

After upgrading to mountain lion i keep getting an error message saying my startup disc is full. it shouldnt be full because there is barely anything on there and i was running windows with bootcamp prior to this with no issues

after upgrading to mountain lion i keep getting an error message saying my startup disc is full. it shouldnt be full because there is barely anything on there and i was running windows with bootcamp prior to this with no issues. my computer now freezes and programs close randomly. The usual command for opening windows with bootcamp doesnt work. once in restarted my computer after it froze and it rebooted in windows automatically. i really just want to know if there is a way to take the upgrade off my laptop because it is very annoying.

Hi Memalyn
Essentially, the bare issue is that you have a 500GB hard drive with only 10GB free. That is not sufficient to run the system properly. The two options you have are to move/remove files to another location, or to install a larger hard drive (eg 2TB). Drive space has nothing to do with SMC firmware, and usually large media files are to blame.
My first recommendation is this: download and run the free OmniDiskSweeper. This will identify the exact size of all your folders - you can drill down into the subfolders and figure out where your largest culprits are. For example, you might find that your Pictures folder contains both an iPhoto Library and copies that you've brought in from a camera but are outside the iPhoto Library structure. Or perhaps you have a lot of purchased video content in iTunes.
If you find files that you KNOW you do not need, you can delete them. Don't delete them just because you have a backup, since if the backup fails, you will lose all your copies.
Don't worry about "cleaners" for now - they don't save much space and can actually cause problems. Deal with the large file situation first and see how you get on.
Let us know what you find out, and if you manage to get your space back.
Matt

Mac OS X Leopard installation disc after I install Windows Vista

Hi everyone! Do I need to put my Mac OS X Leopard installation disc after I install Windows Vista? I try to run the windows without install Mac-specific driver for windows but it restarted and back to Mac OS. The frustrated thing is I did not bring my Mac OS with me. Anyone has any solution? Or how can i request a installation disk from Apple? Thank you!

Hi everyone! Do I need to put my Mac OS X Leopard installation disc after I install Windows Vista? I try to run the windows without install Mac-specific driver for windows but it restarted and back to Mac OS. The frustrated thing is I did not bring my Mac OS with me. Anyone has any solution? Or how can i request a installation disk from Apple? Thank you!
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Another option is to spend $20 on a usb adapter that can connect any drive to your Mac. [Here is one that I have|http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo =2329300&CatId=3770] from Tiger Direct that works quite well.

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http://www.apple.com/support/bootcamp/

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I juest installed Windows 7 using BootCamp. The next thing I need to do is download the Mac installation software to load onto Windows.
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I kept a dual boot of windows 7 and mac os x lion in macbook pro. so, should i keep antivirus for windows 7? which is prescribable between bit defender(bd) and microsoft security essentials(mse)?does bd and mse un-installs easily?

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lower your font size unless you have difficulty
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Then again maybe time to investigate Windows 8 RP (which uses Defender)

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Just found this solution on another website. I tried it and it works. No more polar bears and Savannahs!
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Whenever I work on my Mac it keeps reverting back to the previous settings once I restart.....Please Help!

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Mac Startup Disc Keeps Reverting to Windows

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