Q: i have a used macbook pro and i cant update the apps bought on the first owners account and i need to update the apps

You need to delete and redownload them, and should erase the internal drive and install a fresh OS.

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1. Click here for information.

2. If they're paid applications, yes.

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It appears as if the OS currently on that machine was not the original OS? If so, you are running into this problem because the seller did not do what he was supposed to do - he was supposed to erase the hard drive and reinstall the original OS. And, if he got either the OS or any apps at the app store, they are not transferable as they are tied to his Apple ID forever. That is why you will have to pay for them using your own Apple ID. And, if he obtained the current OS at the app store, you may also run into another problem: you may not be able to reinstall the OS if needed as that is tied to the original Apple ID as well.