Verdict: The Unarchiver is a free cross-platform file archiver that supports even more file formats than a built-in ZIP extractor on Mac. This program works with the common archive files such as 7-ZIP, ZIP, RAR (including v5), GZIP, TAR, and BZIP2. The Unarchiver can read old formats such as LZH, ARJ, StuffIt, DiskDoubler, and ARC.
ExtractNow is a simple utility that allows you to extract multiple archives quickly and easily. The Unarchiver, which supports only older ACE archives(not created with WinAce). It is available either as a direct download, or from the Mac App Store (with further restrictions/sandboxing). RAR, which can decompress ACE archives. On macOS, it is only available as a command-line utility.
Ace File Extractor Machine
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Free Zip File Extractor Mac
Can unpack multi-part archives (zip.001, rar.part1, z01, etc)
| Filename extension | |
|---|---|
| Internet media type | application/x-ace-compressed |
| Developed by | e-merge GmbH |
| Type of format | data compression |
In computing, ACE is a proprietary data compression archive file format developed by Marcel Lemke, and later bought by e-merge GmbH. The peak of its popularity was 1999–2001, when it provided slightly better compression rates than RAR, which has since become more popular.
WinAce[edit]
WinAce, maintained by e-merge GmbH, is used to compress and decompress ACE files under Microsoft Windows. When installed, it lets the user choose between paying for a registration or installing WhenU SaveNowadware. e-merge GmbH also produces a Commandline ACE for DOS; and a freeware command-line interface decompression tool for Linux (i386) and macOS called 'Unace'. e-merge GmbH also provides several libraries for developers, including a freeware decompression DLL called 'unace.dll'. Some third-party archivers can read the format using this DLL. None of the above is open sourcefree software.
On November 23, 2007, version 2.69 of WinACE was released, including a less-intrusive adware application, MeMedia AdVantage, which replaces WhenU. No other major changes are in this release.
Other implementations[edit]
An older version of an Unace 1.2b is free software and licensed under the GPL by the author Marcel Lemke, but it cannot extract ACE archives from version 2.0 and newer.[1]
A newer version of Unace 2.5 that supports ACE 2.0 archives is available under a restrictive open source license, also by Marcel Lemke.[2]
An older, independent C implementation is part of XAD-Master libxad by Dirk Stöcker. It is limited to unpacking ACE 1.0 archives.
Since 2017, there is a BSD licensedpython module and CLI utility by Daniel Roethlisberger, that supports unpacking of ACE 2.0 format archives.[3]
Third-party support[edit]
Packing of ACE files is licensed as proprietary information and only available through WinACE, while unpacking of ACE files is supported by a number of third-party archivers. However, virtually all of them (the ones that support ACE 2.x format) do this by using the proprietary 'unace.dll' from e-merge GmbH.
Use for malware distribution[edit]
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Since at least 2015, ACE archives have been used to deliver malware to victims by e-mail. This tactic was viable because popular archiving software was able to uncompress ACE archives, but support for the ACE format in security products such as mail filters, web content filters and anti-virus software was generally weak.[4][5][6]
Security vulnerabilities[edit]
In February 2019 several major security vulnerabilities were found in the unacev2.dll library which is used by WinRAR and other archiving products. Since WinACE is abandonware, users are advised against opening ACE archives in WinRAR and possibly other products using this library.[7] WinRAR stopped supporting ACE as of version 5.70, and similar products are following suit.
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See also[edit]
External links[edit]
- Official Website - Web Archive Snapshot from 14.07.2017(in English)
References[edit]
- ^'unace: extract, test and view .ace archives'. Debian.
- ^'unace-nonfree: extract, test and view .ace archives (non-free version)'. Debian.
- ^'acefile: Read/test/extract ACE 1.0 and 2.0 archives in pure python'. PyPI. Retrieved 2019-03-09.
- ^'Malware sent in .ace format'. Frank Leonhardt's blog. Retrieved 2019-03-09.
- ^'Spammers discover the 7z archive format for spreading ransomware'. IBM X-Force Exchange. Retrieved 2019-03-09.
- ^'How to deal with .ACE malware files?'. Marc Rivero López' blog. Retrieved 2019-03-09.
- ^'Extracting a 19 Year Old Code Execution from WinRAR'. Check Point Research. 2019-02-20. Retrieved 2019-02-26.
