Blacktop is a specialized software publisher whose tools cater to iOS and macOS security researchers, reverse engineers, and forensic analysts who need deep, command-line access to Apple firmware and operating-system internals. The company’s flagship utility, ipsw, functions as a multi-purpose “Swiss Army knife” for examining iOS and macOS firmware bundles: it can unpack and repackage IPSW files, extract kernel caches, diff binaries between versions, mount encrypted file systems, parse security manifests, and export symbols that reveal how Apple’s low-level components evolve with every release. Companion product ipswd turns the same engine into a lightweight daemon, letting teams automate firmware analysis across networks or integrate it into continuous-integration pipelines without repeatedly spawning heavyweight processes. Typical workflows include diffing two consecutive iOS builds to catalog patched vulnerabilities, carving out individual dylibs for static analysis, or scripting nightly downloads of beta firmware so QA labs can pre-screen device support. Security consultants embed these utilities in larger toolchains to generate SBOMs for mobile-device fleets, while academic researchers leverage them to measure Apple’s mitigations against published CVEs. Hobbyists also rely on the software to decrypt and explore tvOS or watchOS bundles when new set-top boxes or wearables appear. Blacktop’s command-line applications are available at no cost on get.nero.com, where downloads are delivered through trusted Windows package sources such as winget, always fetch the newest upstream builds, and can be installed individually or in unattended batches.