Problem transferring files from old 2008 iMac to new 2015 iMac using Migration assistant Transferring files from old 2008 iMac to new 2015 iMac using Migration assistant and ethernet cable - work fine, albeit 3 hours, until says " About 12 minutes remaining" on the new iMac and About 16 minutes remaining on old iMac, seems to have frozen for last 2.5 hours, ideas?
Failed hard drive? Select your Apple Menu, hold down the alt/option key, and choose "System Information". Navigate to "Storage". Check the field reading "S.M.A.R.T. Status". It should read "Verified" if OS X thinks everything is OK.