Mac SE NVRAM battery removal

Chris Hanson cmhanson at
Mon Nov 7 11:56:55 CST 2016

There's nothing stored in the Parameter RAM that won't be restored to a default state by the OS on boot.

Macs generally won't boot without a PRAM battery though, so if you're storing your systems without one, you'll need to replace the battery before use.

You might want to run some wire for a socket out of the case if you're going to do that regularly, since it can be a pain to get in there on many models―and not just on compact Macs, either, though they're obviously tough.

  -- Chris

Sent from my iPad

> On Nov 6, 2016, at 2:49 PM, Jules Richardson <jules.richardson99 at> wrote:
> So I'm working my way (more slowly than I probably should be) through my systems, ditching ancient on-board batteries before they leak...
> In the case of the Mac SE's, are there any critical settings which I should make a note of before removing the on-board battery? Should I expect any issues trying to run the machines without? (I'm not inclined to replace batteries unless I have to, just so I don't have to worry about replacement again in x years time)
> cheers
> Jules

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