What was the gross margin for Apple in Q3 2021
. And so we feel really, really great about both categories. And as Luca kind of said during the preamble or opening comments, we -- our results are really strong for iPhone around the world.
And so it's been a very, very strong cycle. And yet we're -- the penetration on 5G is obviously still very, very low. And so we feel really good about the future of the iPhone.
Shannon Cross -- Cross Research LLC -- Analyst
OK. And maybe if you can talk a bit about China, up 58%, where are you seeing the growth? What are you hearing from customers there? How is this -- actually, 58% is not sustainable, but how sustainable is the strength?
Tim Cook -- Chief Executive Officer
It was an incredibly strong quarter. It set a June quarter revenue record for Greater China for us, and so we're very proud of that and doing the best job we can to serve customers there. We had a particularly strong response to the 12 Pro and the 12 Pro Max. Those results were particularly strong.
And if -- but if you look at the balance of our products, we also set June quarter records for wearables, home, and accessories for Mac and for services. So it was sort of an across-the-board strength. And we're seeing plenty of new customers come to the market. For example, Mac and iPad, about two-thirds of the customers who bought in the last quarter were new to that product.
For the Apple Watch, that number was 85%. And so we could not be happier with the results.
Shannon Cross -- Cross Research LLC -- Analyst
Was the 85% China or overall?
Tim Cook -- Chief Executive Officer
85% was China. Yes. I was talking about, specifically, the numbers I referenced were specifically for China.
Luca Maestri -- Chief Financial Officer
And then, Shannon, for the world, the Watch is 75%.
Shannon Cross -- Cross Research LLC -- Analyst
Right. Great. Thank you so much.
Tejas Gala -- Director, Investor Relations, and Corporate Finance
Yes. Thanks, Shannan. Can we have the next question, please?
Operator
Thank you. We'll take our next question from Amit Daryanani with Evercore. Please go ahead.
Amit Daryanani -- Evercore ISI -- Analyst
Perfect. Thanks a lot for taking my question. I have two as well. I guess, first off, Luca, I was hoping you could maybe talk a little bit more about the gross margins and maybe the expectations you laid out for September.
I think sequentially, it implies it's down a hundred basis points or so. So maybe just touch on what are the puts and takes there would be helpful because I think historically, September tends to be flattish, maybe even up a little bit gross margin number for you folks.
Luca Maestri -- Chief Financial Officer
Yes. I think it's important to go back to the Q3 results. Right? It's 43.3%. And one of the things that I mentioned is that in addition to getting really good cost savings on a sequential basis, we also had a very high mix of services as part of the total, and particularly, with advertising doing really, really well because of the rebound that we saw from the COVID lockdowns a year ago.
And so as we move forward sequentially, we do expect a different mix, and so that drives the guidance that we provided, which, again, as you know, it's significantly higher than just a year ago. For example, a year ago, we were at 38.2%, so almost 400 basis points of expansion on a year-over-year basis. Right? And so I think it's important to take that into account, just a different mix.
Amit Daryanani -- Evercore ISI -- Analyst
Got it. No. Absolutely. I don't think anyone expected gross margins to be north of 40% just quickly for you, folks.
So that is impressive. If I could follow up on Services, and I know you called out the 33% growth this quarter as a bit of an aberration. The compares were easier. But as you look at your services growth rate over the last four quarters, let's just say, what do you think is enabling this growth? Is it you're able to have a higher ARPU more monetization of your installed base? Or is your installed base growing? I'm curious, which one is bigger? And then over time, how do you think those two components stack up f
. And so we feel really, really great about both categories. And as Luca kind of said during the preamble or opening comments, we -- our results are really strong for iPhone around the world.
And so it's been a very, very strong cycle. And yet we're -- the penetration on 5G is obviously still very, very low. And so we feel really good about the future of the iPhone.
Shannon Cross -- Cross Research LLC -- Analyst
OK. And maybe if you can talk a bit about China, up 58%, where are you seeing the growth? What are you hearing from customers there? How is this -- actually, 58% is not sustainable, but how sustainable is the strength?
Tim Cook -- Chief Executive Officer
It was an incredibly strong quarter. It set a June quarter revenue record for Greater China for us, and so we're very proud of that and doing the best job we can to serve customers there. We had a particularly strong response to the 12 Pro and the 12 Pro Max. Those results were particularly strong.
And if -- but if you look at the balance of our products, we also set June quarter records for wearables, home, and accessories for Mac and for services. So it was sort of an across-the-board strength. And we're seeing plenty of new customers come to the market. For example, Mac and iPad, about two-thirds of the customers who bought in the last quarter were new to that product.
For the Apple Watch, that number was 85%. And so we could not be happier with the results.
Shannon Cross -- Cross Research LLC -- Analyst
Was the 85% China or overall?
Tim Cook -- Chief Executive Officer
85% was China. Yes. I was talking about, specifically, the numbers I referenced were specifically for China.
Luca Maestri -- Chief Financial Officer
And then, Shannon, for the world, the Watch is 75%.
Shannon Cross -- Cross Research LLC -- Analyst
Right. Great. Thank you so much.
Tejas Gala -- Director, Investor Relations, and Corporate Finance
Yes. Thanks, Shannan. Can we have the next question, please?
Operator
Thank you. We'll take our next question from Amit Daryanani with Evercore. Please go ahead.
Amit Daryanani -- Evercore ISI -- Analyst
 Perfect. Thanks a lot for taking my question. I have two as well. I guess, first off, Luca, I was hoping you could maybe talk a little bit more about the gross margins and maybe the expectations you laid out for September.
I think sequentially, it implies it's down a hundred basis points or so. So maybe just touch on what are the puts and takes there would be helpful because I think historically, September tends to be flattish, maybe even up a little bit gross margin number for you folks.
Luca Maestri -- Chief Financial Officer
Yes. I think it's important to go back to the Q3 results. Right? It's 43.3%. And one of the things that I mentioned is that in addition to getting really good cost savings on a sequential basis, we also had a very high mix of services as part of the total, and particularly, with advertising doing really, really well because of the rebound that we saw from the COVID lockdowns a year ago.
And so as we move forward sequentially, we do expect a different mix, and so that drives the guidance that we provided, which, again, as you know, it's significantly higher than just a year ago. For example, a year ago, we were at 38.2%, so almost 400 basis points of expansion on a year-over-year basis. Right? And so I think it's important to take that into account, just a different mix.
Amit Daryanani -- Evercore ISI -- Analyst
Got it. No. Absolutely. I don't think anyone expected gross margins to be north of 40% just quickly for you, folks.
So that is impressive. If I could follow up on Services, and I know you called out the 33% growth this quarter as a bit of an aberration. The compares were easier. But as you look at your services growth rate over the last four quarters, let's just say, what do you think is enabling this growth? Is it you're able to have a higher ARPU more monetization of your installed base? Or is your installed base growing? I'm curious, which one is bigger? And then over time, how do you think those two components stack up f