Handoff is not enabled by default despite having Bluetooth 4.0

I currently have a 2011 macbook air that for some reason does not support handoff, despite having hardware capable of running it. I have Bluetooth 4.0 (The requirement for Handoff), but the option to enable handoff does not appear. Could anyone tell me why it is not available? Is it because there is some other hardware that is needed? Or is it because Apple chooses to make older computers obsolete on purpose?

I currently have a 2011 macbook air that for some reason does not support handoff, despite having hardware capable of running it. I have Bluetooth 4.0 (The requirement for Handoff), but the option to enable handoff does not appear. Could anyone tell me why it is not available? Is it because there is some other hardware that is needed? Or is it because Apple chooses to make older computers obsolete on purpose?

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