BUNDLE files exist as 2 different types. Please find information about each of them below.
Type 1: macOS Loadable Bundle
In macOS bundles group files as one item. Bundles contain code and resources like images. Other systems put resources in executables. Old Macs add metadata. Plugins extend apps dynamically. They have ...
In macOS bundles group files as one item. Bundles contain code and resources like images. Other systems put resources in executables. Old Macs add metadata. Plugins extend apps dynamically. They have code and resources in a bundle directory. Use bundles to lazy load code or let others extend apps.
BUNDLE files are macOS loadable bundles. System bundles have related files. App bundles are typically plugins. BUNDLEs appear as one file but contain several. Many BUNDLEs are in the System Library. App BUNDLEs are often in install or support directories. Do not open BUNDLEs manually.
BUNDLEs extend macOS apps. They have code and may have resources. BUNDLEs can be audio and video drivers, printer filters, etc. PLUGIN is another bundle extension. Linux uses BUNDLE for app bundles like VMware Workstation installers.
BUNDLEs add to OS or apps in Mac OS X. Examples are audio, video, printer extensions, Dreamweaver extensions, and iMovie effects. Most are in System Library. Others are in app folders. Do not open manually. Open with OS X apps. Converting is unlikely but contents could extract. BUNDLEs are macOS app packages.
Unity Engine
Unreal Engine