Time Machine is not backing up

[jdklemisch]

The last time I connected my external drive that I use for time machine was in March. I just connected it and opened Time Machine. It only shows the last update it did. Its been connected for about 2 hours and it hasn't done anything. I can't find any start or backup now buttons.

Can any one tell me how to force it to update now?

Thanks,
Jennifer

 

[appleguy123]

You need to reenable time machine in system preferences.

 

[jdklemisch]

Great - Thanks Appleguy.

It was already enabled. I disabled it and re enabled it. Maybe that will do it.

 

[appleguy123]

And how do I do that?

System preferences>Time Machine then flip the switch to turn it on?