What are Rev A's, Rev B's, and etc.?

[philipxz]

Hello,

I know all about product updates but I've been hearing all about Rev's...
How do I know which rev I have?

 

[miles01110]

They just refer to updates. The original model is "A", the first update is "B", etc.

 

[eXan]

You have the first unibody MacBook, so its a rev.A

My 2006 plastic MacBook is second plastic MacBook version, so its rev. B.

My aluminium iMac is first version, so its rev. A

Hope thats clear ^^

 

[philipxz]

Are revisions like an update within update?

So I have the MacBook 5,1 Rev A? And there will be Macbook 5,1 Rev B then MacBook 5,1 Rev C?

If there's a MacBook that will receive an update at the WWDC will it be called MacBook 5,2? Or MacBook 5,1 Rev B?

When does the variable change?

 

[appleguy123]

When does the variable change?

with a complete redesign

 

[nick9191]

with a complete redesign

Or architecture change (PowerBook to MacBook Pro).

 

[aethelbert]

Or architecture change (PowerBook to MacBook Pro).

That was indeed a total redesign. Just not on the outside.

 

[eXan]

Are revisions like an update within update?

So I have the MacBook 5,1 Rev A? And there will be Macbook 5,1 Rev B then MacBook 5,1 Rev C?

If there's a MacBook that will receive an update at the WWDC will it be called MacBook 5,2? Or MacBook 5,1 Rev B?

When does the variable change?

No, its not an update within an update, its just an update.

Model identifiers change this way:

- The first MacBook ever had the identifier 1,1. It was revision A.
- The second MacBook (like mine) was 2,1. It was the same externally and had the same name and the same architecture (Intel), thus becoming a rev. B
- The third MacBook was 3,1. Again, same everything, just with improved specs - rev. C
- etc.

Your MacBook is the first after a redesign (aluminium), but still has the same name, so the model identifier continues from where it left the plastic MacBooks, but revision number resets, becoming a rev. A.

I hope that's clear ^^