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Fix Boot Camp Assistant's 'too many large files' problem Install
If you've been using your Mac for months before deciding you need a Boot Camp partition, you may find it's too late. When you run the Boot Camp Assistant, it may tell you that you have too many 'large files' on the system for Boot Camp to create a partition.

One solution found on the interwebs is to use iDefrag to defrag your computer. I am not a fan of this, as I am on a budget :). As an alternative, try these steps:
  1. Open up Disk Utility.
  2. Navigate to the Partitions tab.
  3. Shrink your primary partition by the amount of space you want your Boot Camp partition to take up. NOTE: You may need to do this in two or three tries, as Disk Utility may throw an error if you try to resize by too large an amount. I had to do it in three small increments.
  4. Now that the partition has shrunk, expand the partition so it covers the rest of the disk, or as much space as you would like.
  5. Run Boot Camp Assistant. Everything should now run smoothly.
This method worked for me, after tinkering for an hour or so trying out different solutions.
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Fix Boot Camp Assistant's 'too many large files' problem | 7 comments | Create New Account
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Fix Boot Camp Assistant's 'too many large files' problem
Authored by: JPry on Dec 14, '09 08:34:58AM

There's also the sledgehammer approach: Backup your hard drive via Time Machine, (you should be doing this anyway if you're partitioning your Hard Drive) then start your computer with the OS X install disc. Use Disk Utility to erase your drive, and then reinstall OS X and restore from your Time Machine backup. That should clear up any fragmentation problems, and allow you to continue with your Boot Camp partition.



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Fix Boot Camp Assistant's 'too many large files' problem
Authored by: pub3abn on Dec 14, '09 08:48:43AM

TechTool Pro also comes with a defrag utility, which will accomplish the same thing. Of course if you are planning to use the active boot partition as your source for the Boot Camp partition, you must run it from the install DVD, or from a second drive, or a second computer in FireWire target mode, or from TTP's eDrive.

Edited on Dec 14, '09 08:49:29AM by pub3abn



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Fix Boot Camp Assistant's 'too many large files' problem
Authored by: pendraggon87 on Dec 14, '09 11:35:28AM

TechTool does indeed have a defrag tool - unfortunately I did not find my CD of it till after I did this. This method, though, takes much less time than it does to defrag the system.



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Fix Boot Camp Assistant's 'too many large files' problem
Authored by: federico balbi on Dec 14, '09 01:43:30PM

I have found that booting from the install DVD and using the Disk Utility original hint works in cases in which it didn't when booted from the HD.



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Fix Boot Camp Assistant's 'too many large files' problem
Authored by: cmac6126 on Dec 15, '09 10:02:49AM

Boot Camp Assistant is not needed if you're doing this.

Once you've shrunk your partition, then just make a new one where you want windoze to be and format as MS-DOS (FAT).
Reboot to the install disk and select that new partition to install too. Make sure to re-format to NTFS or FAT32 using the install tool first. Stick in the Leopard or SL disk after booting the first time to install the Apple drivers.

I've done this several times on a MBP and new iMac and never used Boot Camp at all (although I admit I usually re-partition as soon as I get a new machine anyway, hard lessons from years of Unix use ;-)
I use these installs both to use with VMWare Fusion and also to (rarely) boot into.

From what I understand all Boot Camp is doing is automatically re-partitioning for you. Which is why it's great for the less technically minded users who don't want to even know what a partition is! Not dissing them, I'm glad that Apple makes it easier. I'm just saying that there's a faster way to do this.

Note: MS has to be on one of the first 4 partitions, although I haven't tried this with W7 so they might have got over this limitation.



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Fix Boot Camp Assistant's 'too many large files' problem
Authored by: pendraggon87 on Dec 15, '09 09:20:59PM

From what I understand, Boot Camp not only repartitions, but adds in a bootstrapper (I may be completely wrong on that terminiology) - it emulates the Windows BIOS using EFI and some sort of partition table synchronization (the GUID partition table).



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Fix Boot Camp Assistant's 'too many large files' problem
Authored by: wm on Dec 16, '09 03:18:24PM

The BIOS emulation is already in the Mac's firmware*, and Disk Utility will set up the partition tables just like Boot Camp Assistant IF you use it to create at least one FAT32 partition (as the OP suggested).

*Unless it was made before Apple announced Boot Camp in 2006 and hasn't been upgraded, but that's unlikely.



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