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macOS Tahoe Brings a New Disk Image Format
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Apple introduced a notable feature in the macOS 26 "Tahoe" update, a disk image format called ASIF (Apple Sparse Image Format).
Apple's new disk image format could end years of frustration with virtual machines on Macs. (Apple, operating systems)
Apple has introduced a new disk image format ASIF (Apple Sparse Image Format) to improve virtual machine performance and storage efficiency. The format uses a sparse file design, occupies space according to actual data, and provides read and write speeds close to native disks. Apple recommends that users switch the RAW format to ASIF to optimize performance, but virtual machine developers need to adapt and support it.
technewstube.com
slashdot.orgmacOS Tahoe Brings a New Disk Image Format
Apple's macOS 26 "Tahoe" introduces a new disk image format called ASIF, designed to dramatically improve performance over previous formats like UDRW and sparse bundles -- achieving near-native read/write speeds for virtual machines and general disk image use. The Eclectic Light Company reports: Apple provides few technical details, other than stating that the intrinsic structure of ASIF disk images doesn't depend on the host file system's capab…
MacOS Tahoe brings a new disk image format – OSnews
Disk images have been valuable tools marred by poor performance. In the wrong circumstances, an encrypted sparse image (UDSP) stored on the blazingly fast internal SSD of an Apple silicon Mac may write files no faster than 100 MB/s, typical for a cheap hard drive. One of the important new features introduced in macOS 26 Tahoe is a new disk image format that can achieve near-native speeds: ASIF, documented here. This has been detailed as a major …
Encrypted disk images on the Mac are notoriously slow. With the new format ASIF this should change. It is ready for Tahoe and Sequoia.
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