The Jasik Debugger (or more correctly, The Debugger from Jasik Designs), was a

debugger A debugger or debugging tool is a computer program used to software testing, test and debugging, debug other programs (the "target" program). The main use of a debugger is to run the target program under controlled conditions that permit the pr ...

tool for the

classic Mac OS Mac OS (originally System Software; retronym: Classic Mac OS) is the series of operating systems developed for the Macintosh family of personal computers by Apple Computer from 1984 to 2001, starting with System 1 and ending with Mac OS 9. The ...

. Pitched as a much more powerful alternative to

Macsbug MacsBug is a low-level (assembly language/machine-level) debugger for the classic Mac OS operating system. MacsBug is an acronym for ''Motorola Advanced Computer Systems Debugger'', as opposed to ''Macintosh debugger'' (The Motorola 68000 Micropr ...

, it was a popular choice among professional Mac developers until the advent of more advanced source-level debuggers such as that built into

Metrowerks Metrowerks was a company that developed software development tools for various desktop, handheld, embedded, and gaming platforms. Its flagship product, CodeWarrior, comprised an IDE, compilers, linkers, debuggers, libraries, and related tools. I ...

Codewarrior CodeWarrior is an integrated development environment (IDE) published by NXP Semiconductors for editing, compiling, and debugging software for several microcontrollers and microprocessors (Freescale ColdFire, ColdFire+, Kinetis, Qorivva, PX, Free ...

. While Jasik's debugger featured a

graphical user interface The GUI ( "UI" by itself is still usually pronounced . or ), graphical user interface, is a form of user interface that allows users to interact with electronic devices through graphical icons and audio indicator such as primary notation, inste ...

, it was laid out in a very arbitrary and peculiar way, with buttons seemingly randomly sized and positioned. This gave it a reputation as difficult to use.

References

Jasik Designs page describing debugger features
Macintosh operating systems development Debuggers Discontinued development tools Classic Mac OS programming tools {{mac-software-stub