Problems with formatting USB flash drive for boot camp. Help!

I formatted a 16 GB flash drive to Master Boost Record and it's only have one partition, and it's under the FAT32. It has 16.04 GB of free space and my Windows 7 ISO will take up 16.02 GB. Every time I drag it into the partition I made, it says the fine is too big. So i decided to use my 1TB external hard drive, and even though when I format it the same exact way, and it has 1 TB of space it still says it doesn't have enough free space. What gives?

iMac, OS X Yosemite (10.10.3), Model ID 11,2 (21.5" mid 2010)

Posted on Jun 2, 2015 4:27 PM

Reply
21 replies

Jun 2, 2015 5:16 PM in response to Kappy

So I basically need to use a CD-R instead a USB? I'm lost. I've been using the link you sent me, and followed it to a T. The biggest thing is when you load up Boot Camp, I don't have all three options on the checklist. I only have two. Basically, with these three options:

-Create a Windows 7 or later installer disc

-Download the latest Windows support software from Apple

-Install Windows 7 or later version


I don't have the first option listed on mine. And in that article it states I need all three options, which I'm sure is what I need, since I've tried doing it with only the last two options, and Windows 7 never installed properly.

Jun 2, 2015 5:58 PM in response to MissSpyderGST

For most Macs with built-in Optical drives (except a couple of 2011/2012 models), there option to create a USB Installer is not available.


1. Burn your ISO to a DVD - Disk Utility (Yosemite): Burn a disk image to a CD or DVD . Your ISO should be about 3-4GB in size. If you have a 16GB ISO, it is too big.

2. Run BCA and click on both available options. Insert a USB2 flash drive, if needed.

3. Partition your internal disk and install Windows.

4. Install BC Drivers from the link that Kappy provided, if necessary.

Jun 3, 2015 3:43 PM in response to Loner T

Still not working right. I got the ISO to 3.22 GB though. This is what I've been doing, exactly:

-Pop in my Windows 7 Home Premium 64-bit

-Create the ISO, change out the extension from .cdr to .iso

-Format USB flash drive to the FAT32 file system, under Master Boot Record (I only make one partition in it)

-Open BCA, select the two options I have available.

-Follow the prompts and at one point, it tells me to insert my Windows DVD before it can continue, so I do that, while the flash drive is plugged up (it won't let me continue through unless I have the flash drive plugged up and the Windows 7 disc inserted).

-Installing Windows the correct way (Selecting the Boot Camp Partition, formatting it, and then applying the install).


Then here's what happens next- I Finish the installation, once the computer restarts, it turns blank and stays blank. It won't allow me to go through the set-up process.

This is why I'm completely lost. I follow the instructions as the computer tells me and the BCA support page tells me, yet I'm running into this issue?

Jun 3, 2015 5:41 PM in response to MissSpyderGST

Just to let you know, I had an issue with the USB ports on the Windows side when I had it, and I could never get it fixed, and it caused many problems... Maybe my USB port/s are corrupt? Because it shows up on my desktop that it's plugged in, but I can't get any info like what you did with yours. And it is plugged in. This is becoming more and more stressful. I'm so sorry if your getting annoyed with me. The Mac was given to me by my parents, who are avid gamers, mostly MMORPGs and this computer was constantly on, and went through many power surges. So I'm not even sure if the computer is worth it, unless I get a pro to look at it.

This thread has been closed by the system or the community team. You may vote for any posts you find helpful, or search the Community for additional answers.

Problems with formatting USB flash drive for boot camp. Help!

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple Account.