How can I determine what OS i have on my mac if it won't start up?

Hard drive is dead and I having a new one installed but the installer wants to know what Operating System I had. I don't remember.

If the hard drive is dead, you can't get that information from it, but shouldn't need to have it before running a full OS installer.
If you're referring to a person and not an application by 'installer', the process varies depending on the computer's original OS. Append the last three characters of its serial number to http://www.everymac.com/ultimate-mac-lookup/?search_keywords= and load the page; Macs which shipped with 10.6.8 or earlier require a disk, while newer ones have a recovery system, which is accessible by pressing the Option, Command, and R keys at startup.
(112489)

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*https://support.mozilla.org/kb/Safe+Mode
*https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes
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How can I determine what computers are home sharing??

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<Edited by Host>

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http://roaringapps.com/apps:table
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(104117)

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Yea,
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LabVIEW Champion . Do more with less code and in less time .

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restore database ;
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RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
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using channel ORA_DISK_1
using channel ORA_DISK_2
using channel ORA_DISK_3
using channel ORA_DISK_4
using channel ORA_DISK_5
using channel ORA_DISK_6
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select file#
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Jason

The minimum point in time is the time when the last backup piece for datafiles in that backup was completed.
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A
LIST BACKUP;in RMAN should also show you the SCNs at the time of the backups.
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Hemant K Chitale
http://hemantoracledba.blogspot.com
Edited by: Hemant K Chitale on Mar 17, 2009 9:41 AM
added the LIST BACKUP command from RMAN.

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Manage Databases Upgrade Status will provide you all active and offline DB details, you can get same result
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Get-SPDatabase | Format-Table Name, ID
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Upgrade-SPContentDatabase WSS_Content
reference:
http://technet.microsoft.com/en-us/library/ff607813(v=office.15).aspx
http://technet.microsoft.com/en-us/library/ff607941(v=office.15).aspx
If my contribution helps you, please click Mark As Answer on that post and
Vote as Helpful
Thanks, ShankarSingh(MCP)

How can I determine what OS i have on my mac if it won't start up?

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