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Why do I get the message "This disk cannot be used to start your computer" w/ upgrade to Mountain Lion from 10.6.8

I have a MacBok pro later than 2007. running 10.6.8 . Downloaded Mountain Lion from app store. When I get to the install page I get the message "This disk cannot be used to start your computer." What is the problem and what can be done?
Thanks,

MacBook Pro, OS X Mountain Lion

Posted on Aug 22, 2012 8:33 PM

Reply
3 replies

Aug 22, 2012 10:05 PM in response to mende1

I appreciate the prompt reply. I saw that on the support community and it isn't giving me a solution.


The disk where the volume I need to upgrade is 250.06 GB Hitachi, the partition window (current) does not have a blue marker for the used data space, so there is no way to resize it.


If it's helpful, System profiler reads:

NVidia MCP89 AHCI:


Vendor: NVidia

Product: MCP89 AHCI

Link Speed: 3 Gigabit

Negotiated Link Speed: 1.5 Gigabit

Description: AHCI Version 1.30 Supported


Hitachi HTS545025B9SA02:


Capacity: 250.06 GB (250,059,350,016 bytes)

Model: Hitachi HTS545025B9SA02

Revision: PB2AC60W

Serial Number: 100814PBL200CSJA72PN

Native Command Queuing: Yes

Queue Depth: 32

Removable Media: No

Detachable Drive: No

BSD Name: disk0

Rotational Rate: 5400

Medium Type: Rotational

Partition Map Type: GPT (GUID Partition Table)

S.M.A.R.T. status: Verified

Volumes:

Capacity: 209.7 MB (209,715,200 bytes)

Writable: Yes

BSD Name: disk0s1

Capacity: 249.72 GB (249,715,376,128 bytes)

Writable: Yes

BSD Name: disk0s2

Macintosh HD:

Capacity: 249.71 GB (249,714,352,128 bytes)

Available: 100.41 GB (100,405,456,896 bytes)

Writable: Yes

File System: Journaled HFS+

BSD Name: disk0s2s1

Mount Point: /

Boot OSX:

Capacity: 134.2 MB (134,217,728 bytes)

Writable: Yes

BSD Name: disk0s3

Why do I get the message "This disk cannot be used to start your computer" w/ upgrade to Mountain Lion from 10.6.8

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