Mac Os X 10.1 Emulator
1.0, an open source project designed to bring game emulation to OS X, has officially launched following a beta testing period. Though there are other emulator options for OS X, OpenEmu has been designed from the ground up for OS X. For the first time, the ‘It just works’ philosophy now extends to open source video game emulation on the Mac. With OpenEmu, it is extremely easy to add, browse, organize and with a compatible gamepad, play those favorite games (ROMs) you already own.OpenEmu is able to emulate the hardware of several different consoles, including several 16-bit systems like the Game Boy, GameBoy Color, Game Boy Advance, Game Gear, NeoGeo Pocket, Nintendo Entertainment System, Sega Genesis, and Super Nintendo, among others.
The emulator features a native OS X interface with a design that mirrors iTunes, offering up ROMs in a unified card-style menu organized by system. OpenEmu includes full save state support, allowing multiple ROMs to be played at once, and it also provides OpenGL scaling, multithreaded playback, and gamepad support. Multiple controllers are supported, including console controllers from Nintendo, Xbox, and PlayStation, along with gamepads from Gravis, Logitech, and more. OpenEmu can currently be downloaded from the for free.
Legally, however, it is different. Then your country's laws are as stupid as the people that make them.
Jan 17, 2014 - 7 classic versions of Windows and Mac OS you can run in a browser. But there are a bunch of browser-based emulators that show you what the. Versions of the classic Mac operating system before it was replaced by OS X,. Mac OS X is an operating system by Apple Inc. It is a conglomoration of NeXTSTEP, A/UX, and Mac OS 9. It is based off the unix kernel and provides compatibility with X11.
Some advanced Mac users may like to perform a clean install of macOS Sierra, which is essentially the process of erasing a hard drive and then starting fresh with a new clean installation of macOS Sierra 10.12. After the clean install is complete, a separate backup of any necessary files is manually. 
During installation, your Mac might restart and show a progress bar several times, and the screen might be empty for minutes at a time. If your Mac restarts to a setup assistant, but you're selling or giving it away, press Command-Q to quit the assistant without completing setup. Then click Shut Down. To backup your Mac: Open Time Machine. Click Select Disk. Choose where you wish to save your files (to the external drive or to the cloud storage). Click On to turn Time Machine on. Click on the 'arrow clock' icon and select Back Up Now in the menu bar at the top of the screen.