[rdlsmith]

Apple sent me a new replacement iMac because of a technical issue the original machine was having.

No problem, I use SD. So, I boot from my external SD drive and copy to the new computer. Things are working fine but for my TM. The new computer, which has the exact same specs and all the data is the same, will not use the existing Time Machine backup to write to or read from. So as it is now, I've lost all the TM history.

Is there anyway around this or do I just have to start a new TM backup?