I had similar problem about a year ago. Very slow login and sometimes imp=
ossible to log in at all - especially when connected wirelessly.
Those MacBooks are they binded with Active Directory or Open Directory Se=
rver?
Possible problems: DNS or/and Kerberos
If you Dns and kerberos are ok it is something good to unbind the compute=
r and bind it again (do not forget to clear cache).
Artur Morka
Director of IT
Lowell School
Washington DC
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