Unable to access MAC OS after installing windows 7

This is because Windows seems to have become your default OS since the installation. Turn off and on your Macbook or restart while holding the left alt-key. This will give you a bootpartition(or cd/dvd for that matter) choice. Select your OSX partition and you should be fine.

#1 by reading the instructions in Boot Camp Assistant or "Manuals" in the Overview for this forum has the pdf guide.

General OS X startup keys

x = Mac OS

assume people know to use Option key

http://manuals.info.apple.com/en_US/boot_camp_install-setup_10.7.pdf

create a Windows support software (drivers) CD or USB storage media

http://support.apple.com/kb/HT4407

The Boot Camp Assistant can burn Boot Camp software (drivers) to a DVD or copy it to a USB storage device, such as a flash drive or hard drive. These are the only media you can use to install Boot Camp software.

https://support.apple.com/kb/HT4569

Installation Guide Instructions for all features and settings.

Boot Camp 4.0 FAQ Get answers to commonly asked Boot Camp questions.

Windows 7 FAQ Answers to commonly asked Windows 7 questions.

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

This is a great collection of links. I had to hunt for them on my own prior to this posting.

Thank you.

I'm preparing to do a Windows 7 install through BootCamp.

Top of the menu for forum: Overview.

>>> Helpful Apple Support Resources <<<

https://discussions.apple.com/community/windows_software/boot_camp?view=overview

Will take anyone to product support page.

What they call "hidden in plain sight" <g>