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Guilherme Rambo

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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

Connect with Guilherme Rambo

Stacktrace Podcast 072: “No more free cookies”, with special guest Michael “Biscuit” Thomas

Stacktrace Podcast

John and Rambo are joined by app security expert Michael “Biscuit” Thomas on this special episode of the show all about iOS app security and encryption. Topics include how to build a threat model and identify attack surfaces, whether it’s worth to protect against Jailbreak-based app hacking, and much more.

Stacktrace Podcast 070: “Crazy speculation town”

Stacktrace Podcast

John and Rambo share their experiences of building apps using SwiftUI, talk about new Mac apps that they love, and discuss what the newly found references to AMD CPUs in macOS might mean. Also, animations, Nintendo 64 copy protection, and thoughts about being a “digital nomad”.

Sponsored by Chargeasap: Preorder the new Flash 150W USB-C Powerbank for $139  (Reg $299) & enter our iPhone 11 giveaway.

Stacktrace Podcast 069: “A pro at not being a pro”

Stacktrace Podcast

A first look at Xcode 11.4, iOS 13.4, and the suite of betas that Apple released this week. Also, the power of declarative UIs, whether a spiritual successor to AirPower might be in the works, and John’s recipe for oven-baked potatoes.

Sponsored by Hyper: Preorder the new HyperDrive GEN2: Next Generation USB-C Hub for $59 (40% off the expected retails price). Learn more about our Mac Pro giveaway.

Stacktrace Podcast 068: “Hindsight is always 2020”

Stacktrace Podcast

Stacktrace is back! The third season of the show kicks off with John and Rambo sharing what they’ve been up to since the last season ended — from beach walks and standing desks, to content deals, new app features and editors that write code themselves. Also, app architecture, refactoring, view controller structure, and so much more. Welcome back everybody!

Sponsored by Longvadon: Get 15% off Longvadon’s premium leather Apple Watch bands with code  9TO5MAC15.  Enter the Apple Watch Series 5 Giveaway here.

Sponsored by Hummingbird: A macOS utility that makes window management a breeze. Learn more and start your free trial at hbird.app, and use offer code SPELUNK for a massive 50% discount.

Stacktrace Podcast 067: “The Year of the Pro”, with special guest Myke Hurley

Stacktrace Podcast

Special guest Myke Hurley joins John and Rambo for the grand season two finale of the show! A wrap-up of 2019’s trends, stories, products and services, and what those might mean for Apple and the tech industry in 2020.

Sponsored by MacStadium: Get 50% off your first two months of a Mac mini subscription now w/ code 9TO5MAC, or get started with MacStadium’s new Orka private cloud.

Sponsored by Setapp: Try subscription Mac app service Setapp for free today and get an annual plan at 20% off from December 23 to December 25.

Stacktrace Podcast 066: “Mac Pro: Enthusiast Edition”

Stacktrace Podcast

Mac Pro Day has finally arrived, but John and Rambo have somewhat mixed feelings about it. Also, a big segment on writing high-performance code, a deep dive into iOS splash screens, and much more.

Sponsored by Hyper: Get 25% off sitewide at Hyper with our exclusive promo code HOLIDAY25 for a limited time.

NativeConnect for Mac is the best way for developers to use App Store Connect

Developers who make apps for Apple’s platforms are used to opening App Store Connect in a browser to manage their apps in the App Store. This portal provides access to edit an app’s description, screenshots, keywords, and also follow sales reports, analytics, and customer reviews. There’s also an official iOS app from Apple available in the App Store that gives access to some limited functionality.

During this year’s WWDC, Apple announced the launch of an official API for App Store Connect, to let developers create their own tools using an officially supported API rather than the hacks that were previously required. Indie developer Vadim Shpakovski announced NativeConnect, a native Mac app to access the same features offered by the web version of the portal. Today, NativeConnect is available on its website.


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Stacktrace Podcast 064: “Poor man’s Migration Assistant”

Stacktrace Podcast

A first-hand impressions review of the 16-inch MacBook Pro, a second opinion on the AirPods Pro, writing system packages in Swift, preparing conference talks, new Stacktrace Arcade picks, and much more.

Sponsored by Hyper: Get early Access to HYPER’s Black Friday Sale using code HYPER30 for 30% off sitewide.

Stacktrace Podcast 063: “Classic butterfly”

Stacktrace Podcast

John and Rambo discuss the announcement of the new 16-inch MacBook Pro, software and hardware decoupling, how to make code testable, and much more. Also, John’s 18-year long wait for a video game, and Rambo’s Swift Playgrounds iPhone port.

Sponsored by Setapp for Teams: Get a 60-day free power trial for Stacktrace listeners (instead of a regular 30-day trial) to try the leading independent app subscription service for macOS.

Stacktrace Podcast 062: “Squeeze Morse Code”

Stacktrace Podcast

On this week’s episode, John and Gui talk about “Sundell as a service”, static site generation (act surprised!), then dive deep into a full review of the AirPods Pro, from the audio quality all the way to what’s the best technique for taking them out of their case. Also, stay tuned for another edition of Stacktrace Arcade and an #askstacktrace question about… Windows?

Stacktrace Podcast 061: “The Apple Cinematic Universe”

Stacktrace Podcast

From modularizing code and cloud-synced databases to reviews of the first set of Apple TV+ shows — this episode of Stacktrace has it all. Also, what could the implications of Photoshop running on ARM64 be, more speculation about Apple’s AR (or perhaps VR?) efforts, and a short trip to Bermuda.

Sponsored by OWC: Get 15% off OWC USB-C Travel Dock and 10% off the 10-Port USB-C Dock w/ code 9TO5DOCK.

Stacktrace Podcast 060: “In-ear HomePods”

Stacktrace Podcast

Apple releases the AirPods Pro, and the Rambo Report makes its triumphant return as the name of Apple’s tracking tag is revealed. Also, balancing fixing tech debt with feature development, Swift vs SDK features, and much more.

Sponsored by MacStadium: Get 50% off your first two months of a Mac mini subscription now w/ code 9TO5MAC, or get started with MacStadium’s new Orka private cloud.

Sponsored by Infinity Cable: Get the new Infinity Cable with interchangeable magnetic tips for USB-C, micro-USB and Lightning- the first with 100W Power Delivery. Available up to 55% off with early bird pricing now.

Stacktrace Podcast 059: “Bugs are people too”

Stacktrace Podcast

Using the iPad Pro for coding and presentations, cross-platform code and feature sharing and what that might mean for products like Photoshop for iPad, and could automated tests improve Apple’s software quality? Also, organizing development tasks, and what it’s like to record podcasts in your non-native language.

Sponsored by MacStadium: Get 50% off your first two months of a Mac mini subscription now w/ code 9TO5MAC, or get started with MacStadium’s new Orka private cloud.

Stacktrace Podcast 058: “It does what it says on the tin”

Stacktrace Podcast

What happens when an indie developer’s product gets copied by Apple, should the App Store review team reject apps based on their visuals or feature set, and what products could we expect Apple to launch in the fall? Also, a brand new segment called “Stacktrace Arcade”, the complexities of releasing software, and much more.

Sponsored by MacStadium: Get 50% off your first two months of a Mac mini subscription now w/ code 9TO5MAC, or get started with MacStadium’s new Orka private cloud.

Stacktrace Podcast 057: “It doesn’t have to be a casino”, with AltStore developer Riley Testut

Stacktrace Podcast

Riley Testut has recently been making a big splash in the community with his AltStore and Delta projects, and on this special episode of Stacktrace, he joins John and Rambo to talk about why and how he built them, and how he thinks they might impact the Apple developer community going forward.

Sponsored by MacStadium: Get 50% off your first two months of a Mac mini subscription now w/ code 9TO5MAC, or get started with MacStadium’s new Orka private cloud.

NapBot is a sleep tracker for Apple Watch powered by CoreML

There’s been a lot of talk recently about sleep tracking on Apple Watch, with rumors of Apple working on a built-in solution to be released next year. While a first-party solution is not yet available, many third-party developers have taken the task upon themselves, and a new app — NapBot — has just been released as an alternative to the other sleep-tracking apps available in the App Store.


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