How to restore default boot up of MacbookPro

I've recently dual-booted Mac with Ubuntu and now when I reload the router it boots up with Ubuntu's grub loader where i see an entry for Mac for both 32-bit and 64-bit. Both options,however, don't work. I have to press option key on bootup to select the HDD containing Mac OS to boot into it. I want to know if there's a way of restoring the default boot loader for Mac OS which currently is being replaced by that of Ubuntu's?
Thanks,
Subeh

A router is a device that routes network traffic between computers
I want to know if there's a way of restoring the default boot loader for Mac OS which currently is being replaced by that of Ubuntu's?
Your going to need the services of a Mac/PC specialist to restore your machine, your very much out of your league I'm afraid.

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An example of the 3rd party programs that people insist on installing and wonder why their systems go haywire.
I would suggest going to the developers site and seeing if they have a downloadable uninstaller.
http://www.taoeffect.com/blog/2009/05/cloak-manage-your-invisible-files/
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Dokie!
I Love my Satellite L775D-S7222 Laptop. Some days you're the windshield, Some days you're the bug. The Computer world is crazy. If you have answers to computer problems, pass them forward.
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I have an fairly new HP Pavilion 14-n228ca notebook which I intend to use mostly for Linux, but still wish to occasionally run the WIndows 8.1 that it shipped with.
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Hello!
I have a problem, because when the message appeared:
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Hello!
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(in translation)
"Security
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option "Always warn ..." is disabled by default and by chance it shut off permanently.
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