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Unable to delete addresses in Mac OS X address book in Thunderbird

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Have discovered my Mac OS X address book in Thunderbird has many, many old addresses and also duplicates. Am finding that the Mac OS X address book is a "read-only" in Thunderbird. Is there anyway to change this setting so I am able to clean up this address book and delete old addresses? Read one article which talked about accessing the Mac OS X address book through my operating system but unfortunately was not able to locate this address book under Finder. Appreciate any help cleaning this mess up. Thanks in advance.

Have discovered my Mac OS X address book in Thunderbird has many, many old addresses and also duplicates. Am finding that the Mac OS X address book is a "read-only" in Thunderbird. Is there anyway to change this setting so I am able to clean up this address book and delete old addresses? Read one article which talked about accessing the Mac OS X address book through my operating system but unfortunately was not able to locate this address book under Finder. Appreciate any help cleaning this mess up. Thanks in advance.

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You need to ask on a mac support forum for help with accessing your address book.