Mail stuck on "Preparing to Import"

Question

Yesterday, seemingly out of the blue, the mail program shot me an error message saying something to the effect of "mail app had been corrupted"...I didn't think much of it but tried to restart it and it took me to a welcome screen and prompted me to "click to import messages or hit cancel to do it later." Well, if I hit continue the app just hangs indefinitely and if I hit cancel the app just closes. I've tried to work through some of the solutions presented in the forums, namely, moving my com.apple.mail.plist file to the desktop--there was a similar solution offered that instead involved moving a file from the cache folder but for some reason I don't seem to have that particular file. I'm uber frustrated and about to pull the rest of my hair out...please help
10.10.1 Yosemite
2.7 i5 iMac

Answer 1

1/13/15 9:23:22.353 PM com.apple.xpc.launchd[1]: (com.apple.imfoundation.IMRemoteURLConnectionAgent) The _DirtyJetsamMemoryLimit key is not available on this platform.
1/13/15 9:23:22.409 PM bird[300]: Assertion failed: ![_xpcClients containsObject:client]
1/13/15 9:23:22.409 PM bird[300]: Assertion failed: ![_xpcClients containsObject:client]
1/13/15 9:23:22.417 PM bird[300]: Assertion failed: ![_xpcClients containsObject:client]
1/13/15 9:23:26.949 PM networkd[145]: -[NETProxyLookup pacLookupComplete:proxies:error:] PAC evaluation error: Error Domain=kCFErrorDomainCFNetwork Code=2 "The operation couldn’t be completed. (kCFErrorDomainCFNetwork error 2.)" UserInfo=0x7ff8ebf1a470 {kCFGetAddrInfoFailureKey=8}
1/13/15 9:23:59.418 PM networkd[145]: -[NETProxyLookup pacLookupComplete:proxies:error:] PAC evaluation error: Error Domain=kCFErrorDomainCFNetwork Code=2 "The operation couldn’t be completed. (kCFErrorDomainCFNetwork error 2.)" UserInfo=0x7ff8ebf1a470 {kCFGetAddrInfoFailureKey=8}
1/13/15 9:24:35.242 PM Mail[1658]: Error reading table of contents file from /Users/N******/Library/Mail/V2/Mailboxes/Deleted Messages (N******).mbox/table_of_contents: Error Domain=NSCocoaErrorDomain Code=260 "The file “table_of_contents” couldn’t be opened because there is no such file." UserInfo=0x600000275080 {NSFilePath=/Users/N******/Library/Mail/V2/Mailboxes/Deleted Messages (N******).mbox/table_of_contents, NSUnderlyingError=0x60000044d5f0 "The operation couldn’t be completed. No such file or directory"}
1/13/15 9:24:36.421 PM Mail[1658]: Error reading table of contents file from /Users/N******/Library/Mail/V2/Mailboxes/ToDos.mbox (N******).mbox/table_of_contents: Error Domain=NSCocoaErrorDomain Code=260 "The file “table_of_contents” couldn’t be opened because there is no such file." UserInfo=0x600000477540 {NSFilePath=/Users/N******/Library/Mail/V2/Mailboxes/ToDos.mbox (N******).mbox/table_of_contents, NSUnderlyingError=0x600000253050 "The operation couldn’t be completed. No such file or directory"}
1/13/15 9:24:36.429 PM Mail[1658]: Error reading table of contents file from /Users/N******/Library/Mail/V2/Mailboxes/ToDos.mbox (N****** (aol)).mbox/table_of_contents: Error Domain=NSCocoaErrorDomain Code=260 "The file “table_of_contents” couldn’t be opened because there is no such file." UserInfo=0x6000004636c0 {NSFilePath=/Users/N******/Library/Mail/V2/Mailboxes/ToDos.mbox (N******(aol)).mbox/table_of_contents, NSUnderlyingError=0x600000252330 "The operation couldn’t be completed. No such file or directory"}
1/13/15 9:24:37.421 PM Mail[1658]: Error reading table of contents file from /Users/N******/Library/Mail/V2/Mailboxes/Drafts (N******)).mbox/table_of_contents: Error Domain=NSCocoaErrorDomain Code=260 "The file “table_of_contents” couldn’t be opened because there is no such file." UserInfo=0x608000076100 {NSFilePath=/Users/N******/Library/Mail/V2/Mailboxes/Drafts (N******)).mbox/table_of_contents, NSUnderlyingError=0x6080010450d0 "The operation couldn’t be completed. No such file or directory"}
1/13/15 9:24:37.429 PM Mail[1658]: Error reading table of contents file from /Users/N******/Library/Mail/V2/Mailboxes/Drafts (N******).mbox/table_of_contents: Error Domain=NSCocoaErrorDomain Code=260 "The file “table_of_contents” couldn’t be opened because there is no such file." UserInfo=0x608000076100 {NSFilePath=/Users/N******/Library/Mail/V2/Mailboxes/Drafts (N******).mbox/table_of_contents, NSUnderlyingError=0x608001042df0 "The operation couldn’t be completed. No such file or directory"}