Accessibility Inspector vs Hercules
Accessibility Inspector
developer.apple.comHercules
hercules-390.euSide by side
| Figure | Accessibility Inspector | Hercules |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Windows | — | Yes |
| macOS | Yes | Yes |
| Linux | — | Yes |
| Plans published | 1 | 1 |
| Spec score · Emulator Software | 8.4 (#10) | 7.8 (#25) |
| Purpose | Accessibility Inspector displays, queries, and tests accessibility information for elements in an app’s view hierarchy. | Hercules is an open-source software implementation of the System/370, ESA/390 and 64-bit z/Architecture mainframe architectures. |
| Support | Apple lists Developer Forums and Feedback Assistant as channels for questions, bug reports, and enhancement requests about developer tools. | Paid technical support may be available through Open Source Mainframes, Inc., while free support is provided through Hercules discussion forums. |
Plans
Accessibility Inspector
- Xcode (includes Accessibility Inspector)Free
In their own words
Accessibility Inspector
Accessibility Inspector is Apple’s free macOS tool for examining accessibility information in app interfaces. It displays an element’s accessibility properties, available actions, and position in the view hierarchy. Audits identify common issues such as insufficient contrast, clipped text, and missing descriptions. Results can be saved as HTML reports containing summaries, screenshots, issue descriptions, and fix suggestions. Accessibility audits can also run in UI tests through performAccessibilityAudit(for:_:). The target menu includes apps on Mac and selected iOS, iPadOS, watchOS, or tvOS devices. Open it from Xcode through Xcode > Open Developer Tool > Accessibility Inspector. Apple’s listing describes Xcode as Mac-only, requiring macOS 26.2 or later and an Apple M1 chip or later, and labels it Free. Clearing reported issues does not prove complete accessibility; Apple recommends additional checks with assistive apps such as VoiceOver.
Hercules
Hercules is a free, open-source emulator for IBM System/370, ESA/390, and 64-bit z/Architecture mainframes. It lets a PC execute programs designed for those systems and represents mainframe I/O devices with PC resources, including DASD files and local tn3270 sessions. It does not provide an operating system, so users must supply one or run a standalone program. With legally licensed software, it can run z/OS, z/VM, z/VSE, OS/390, VM/ESA, VSE/ESA, and older related IBM operating systems. Features include dynamic reconfiguration, an integrated console, interpretive execution, debugging tools, and snapshots and restore. Guest TCP/IP networking can connect to the host through TUN/TAP and hercifc, and multiple instances can share devices. Hercules is licensed under the Q Public Licence and runs on Linux, macOS, and Windows; the host list also names Solaris and FreeBSD. Documented unsupported areas include ESCON, FICON, PR/SM, coupling links, and several z/Architecture facilities. Its FAQ says it has not claimed production capability and was intended as a system programmer's toy.