About the Author

Guilherme Rambo

@_inside

Guilherme Rambo is a Mac and iOS developer based in Brazil. Known for discovering Apple’s secrets and analyzing leaks, he writes about his discoveries on 9to5mac.

If you have any tips or suggestions, contact him at guilherme@9to5mac.com

January 20

John and Rambo react to the latest Mac and iPhone rumors, design a new feature for AirBuddy, talk about Swift Evolution and not-quite-public language features, and discuss various ways of using frameworks and libraries on Apple’s platforms.

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January 13

Rambo goes indie, John realizes once again how important breaks are, and the two discuss the latest rumors around Apple’s AR glasses in great detail, all the way down to the API design level. It’s Stacktrace, after all.

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January 6

On the final holiday special for this year (or, last year?), John and Rambo discuss their expectations for 2021, and what products and new developer tools that they hope to see from Apple during this new year.

Sponsored by MacStadium: Get a cloud hosted M1 Mac mini from $99 or use promo code 9TO5MAC for half off the first two months of a Gen 3 or 4 (Intel) mini. Enter the Mac mini giveaway here

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December 30, 2020

On this second Stacktrace holiday special, John and Rambo look back at the past year and what some of the highlights were among the hectic, strange rollercoaster ride that 2020 has been.

Sponsored by MacStadium: Get a cloud hosted M1 Mac mini from $99 or use promo code 9TO5MAC for half off the first two months of a Gen 3 or 4 (Intel) mini. Enter the Mac mini giveaway here

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December 23, 2020

On the first ever completely non-technical episode of Stacktrace, John and Rambo answer #askstacktrace questions about everything from local holiday traditions to what their favorite airplanes are.

Sponsored by MacStadium: Get a cloud hosted M1 Mac mini from $99 or use promo code 9TO5MAC for half off the first two months of a Gen 3 or 4 (Intel) mini. Enter the Mac mini giveaway here

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December 17, 2020

An accidental deep dive into how the AirPods’ transparency mode is activated over Bluetooth, the launch of Swift by Sundell 3.0, running macOS code in the cloud, multiple headphone reviews and a comparison between the iPhone 12 Pro and 12 mini.

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December 14, 2020

This weekend, developer Loren Brichter released a website claiming that Google Chrome for Mac — or more specifically its auto-update mechanism — was causing the WindowServer process on macOS to constantly have high CPU usage, damaging the performance of macOS, even on high-end machines.

The website includes information on how to completely get rid of Chrome and its updater from your Mac to get your performance back, and went as far as calling it “malware” (that word has since been removed). Many users have reported that this does work and that after removing Google Chrome from their machines, everything got a lot faster.

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December 9, 2020

More on using the M1 Macs as development machines, thoughts on the newly announced AirPods Max and its pricing, the importance of maintaining URLs as stable identifiers, and how AirBuddy is made aware of new audio devices.

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December 2, 2020

On this slightly more code-focused episode of the show, John and Rambo discuss cross-platform SwiftUI development and techniques for integrating SwiftUI with UIKit and AppKit. Also, how the original HomePod can now be jailbroken, using the M1 Mac mini for gaming, and much more.

Sponsored by Honeybadger: Exception and uptime monitoring for application developers. Tell them 9to5Mac/Stacktrace sent you and get 30% off for 6 months

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November 25, 2020

John reviews the M1 Mac mini, and Rambo reviews the iPhone 12 mini. Two “mini products” that turn out to be not very mini in terms of performance. What’s it like using an M1 Mac for tasks like iOS development, and does the iPhone 12 mini feel like a proper flagship phone in 2020?

Sponsored by Honeybadger: Exception and uptime monitoring for application developers. Tell them 9to5Mac/Stacktrace sent you and get 30% off for 6 months

Sponsored by Roborock: Get the Roborock S6 Pure robot vacuum and mop in black for $359.99 (Reg. $599). 

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November 18, 2020

Apple’s lower App Store commission, the future of Swift by Sundell, shipping AirBuddy 2, M1 Mac benchmarks, SwiftUI’s potential as a cross-platform technology, and a review of the Xbox Series X. Yes, all of that in one episode — let’s dive in!

Sponsored by Honeybadger: Exception and uptime monitoring for application developers. Tell them 9to5Mac/Stacktrace sent you and get 30% off for 6 months

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November 11, 2020

The first round of Apple Silicon Macs is finally here, and John and Rambo have lots of thoughts on them. Also, adventures into Multipeer Connectivity and Bluetooth, and mixing development work with design.

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Sponsored by CleanMyMac X: Try CleanMyMac X for free & get 30% off to optimize and clean your Mac.

Sponsored by Honeybadger: Exception and uptime monitoring for application developers. Tell them 9to5Mac/Stacktrace sent you and get 30% off for 6 months

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November 4, 2020

It’s time for John and Rambo to place their bets on what Apple might announce at their upcoming “One More Thing” event. Will we see the first Apple Silicon-powered Macs, and if so, which ones, and what features will they have? Also, artisanal, hand-crafted JSON from Brazil, and computer-generated CSS from Poland.

Sponsored by Survivor: Refined Rugged protection for all iPhone 12 models.

Sponsored by AppfiguresThe tools you need to monitor, optimize, and get more downloads. Use code Stack3030 to get 30% off for the next 3 months.

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October 28, 2020

The story and implementation behind Swift by Sundell Discover, how and why AirBuddy 2 will have an onboarding process, thoughts and comments on the new Apple Silicon-powered iMac rumors, home screen customization hacks, and a deep dive into balancing code-level details with shipping great products.

Sponsored by Honeybadger: Exception and uptime monitoring for application developers. Tell them 9to5Mac/Stacktrace sent you and get 30% off for 6 months

Sponsored by Incipio: Get 20% off cases for all iPhone 12 models with exclusive code: STACKTRACE.

Sponsored by totallee: Get 25% off totallee’s iPhone 12 cases for a limited time with code PODCAST.

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October 21, 2020

The success of the AirBuddy 2 pre-orders is immediately followed by a classic Rambo shopping spree, John continues to explore Swift’s function builders feature, and the two discuss the initial reviews of the iPhone 12 and 12 Pro, the new HomePod home theatre mode, and how their names are actually pronounced.

Brought to you by Raptic: Get 20% off all iPhone 12 cases w/ code 9TO5MACiP12.

Sponsored by Honeybadger: Exception and uptime monitoring for application developers. Tell them 9to5Mac/Stacktrace sent you and get 30% off for 6 months

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October 14, 2020

On this extra long episode of Stacktrace, John and Rambo discuss all of the exciting new announcements from Apple’s October 2020 event, including the new iPhones, the new HomePod Mini, and more. Also, John is building a major new feature for his website and Rambo launches the pre-orders for AirBuddy 2.

Sponsored by AppfiguresThe tools you need to monitor, optimize, and get more downloads. Use code Stack3030 to get 30% off for the next 3 months.

Sponsored by Honeybadger: Exception and uptime monitoring for application developers. Tell them 9to5Mac/Stacktrace sent you and get 30% off for 6 months

Sponsored by Decluttr:Trade-in your old Apple device with a 10% cash bonus and 28-day price lock guarantee now.

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October 7, 2020

Building and using iOS widgets, the community’s adoption of SwiftUI, an update on whether game streaming services are now viable on iOS, multiple ways of using view models, and Swift’s new Windows compatibility.

Sponsored by Honeybadger: Exception and uptime monitoring for application developers. Tell them 9to5Mac/Stacktrace sent you and get 30% off for 6 months

Sponsored by RavPower: Get the new RAVPower 65W 4-Port Desktop USB-C Charging Station for $39 (Reg $59) with code 9TO5MACRP.

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September 30, 2020

Building and using iOS widgets, the community’s adoption of SwiftUI, an update on whether game streaming services are now viable on iOS, multiple ways of using view models, and Swift’s new Windows compatibility.

Sponsored by DEVONthinkManage your documents the smart way on Mac and iOS. Get 10% off with code 9to5mac-2020.

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September 23, 2020

Building responsive app UIs, the launch of iOS 14, and thoughts on the Apple One bundle and some of its international pricing. Also, the return of both #askstacktrace and Stacktrace Arcade, as well as how using iCloud might affect the transferability of an app.

Sponsored by Chargeasap: Preorder the Omega 200W or 100W GaN USB-C Charger for 55% off. And enter our MacBook Pro giveaway! 

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September 16, 2020

Pi Stats lets you monitor your Pi-Hole server on iOS 14 with a simple widget

Pi-Hole is a privacy-focused DNS server that can be installed on many devices, such as the Raspberry Pi. It’s a great way to protect an entire network from tracking by data gathering and mining services, which can be done by setting your local Pi-Hole as the DNS server for your network in your router’s settings. Now Pi Stats has arrived on iOS to easily keep an eye on your DNS server.

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