Pen drive somente leitura mac

Open a Terminal or xterm window. Let's say that you are sure that you didn't mount your USB device on any computer since 20 days. Within your command line window, run the following commands:. This command will display you any file even hidden ones that any operating system might have opened within less than 21 days. The output of this command will display you the detailed last access time of any read or simply touched file or folder.

For example this command will show you that a folder was simply opened. If our suspected colleague or attackant is as skilled as to read this document and to understand how to use it, he might have mounted your USB device read-only too. Hence he would have left it clean of any access time modification.

In this case I have absolutely no method to show that some file was read on your USB device :. For "any USB device" this is certainly not possible, as the standard is for communication. For USB flash drives, you might try checking access dates of the individual files don't count on it, often not used anyway, and your own check may overwrite the dates if you're not careful , or the presence of files you know neither you not your computer could have put there like thumbs.

Trashes for mac. There is little point in having this feature, in a typical consumer product. Even if it were stored in the device's firmware, it would still be dependent on the host computer's clock. Use Belarc Advisor Listen now. Home Questions Tags Users Unanswered. Is there a way to find out when a USB flash drive has been last used on any computer? Ask Question. Asked 5 years, 1 month ago. Active 1 year, 5 months ago. Viewed 94k times. Using my Mac, how do I know when was the last time my usb flash drive was plugged in? Hi gun, I believe that what you are looking for may not be possible unfortunately.

Can I confirm that what you are looking to do is find out if someone else has used your USB key, and you are worried they have accessed some of the files you had in this key? I believe the answer below shows how to tell when someone last plugged a USB key into your computer.


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There are some important caveats, though! Mount your USB device ReadOnly For this the easiest way consists in installing Disk Arbitrator and configuring it so as to only mount any device as read-only. The Disk-Arbitrator menu bar icon should switch to red. If you find anything, you will know when your USB was read. Limitation of waranty If our suspected colleague or attackant is as skilled as to read this document and to understand how to use it, he might have mounted your USB device read-only too. If it helps or if it could be relevant the content of the hdd is a backup made with TimeMachine.

MacOS X stores with every file only one access time: the last one. Open your Console Select system.

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This will let you know the last time s a device was connected to a particular USB bus. Only a real-time clock would help, but needs a battery larger than the memory unit. But any such solution requires the device to be specifically prepared for this. Mount your USB device ReadOnly For this the easiest way consists in installing Disk Arbitrator and configuring it so as to only mount any device as read-only.

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The Disk-Arbitrator menu bar icon should switch to red. If you find anything, you will know when your USB was read. Limitation of waranty If our suspected colleague or attackant is as skilled as to read this document and to understand how to use it, he might have mounted your USB device read-only too.

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If it helps or if it could be relevant the content of the hdd is a backup made with TimeMachine. MacOS X stores with every file only one access time: the last one. Open your Console Select system.

This will let you know the last time s a device was connected to a particular USB bus. Only a real-time clock would help, but needs a battery larger than the memory unit. But any such solution requires the device to be specifically prepared for this. Yeah I wasn't necessarily saying that for the OP, I just pointed out that there was a way of implementing a "security counter" so that an user can know if the device was used without his consent.

Would still require algorithms to reduce the risk of false positives, such as during computer reboots, momentary USB disconnects, "usb power surges", failed mounts, etc, in addition to storing the expected value elsewhere. Not worth the effort. If I were asked to implement it, I'd spend the algorithm space and programming time on making an event logger instead - easier to optimize for proper usage than possible improper scenarios, and storage space is cheap nowadays. Yeah, what I was thinking is to have like a smart card embedded in the USB drive that can log events and can't be easily tampered with.

BioStat BioStat 1. Featured on Meta. Congratulations to our 29 oldest beta sites - They're now no longer beta! Unicorn Meta Zoo 7: Interview with Nicolas. Adding hints for including code in questions about scripting. Question feed. Ask Different works best with JavaScript enabled. Once you've had success you can try out more restrictive options. There is confusion with users of OS X because apple removed their fstab file.

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You simply need to create one. This solution controlling the fstab file is very portable. Fstab file detailed info and explanations linux flavor. Here are instructions on Ask Different. Thank you for your interest in this question. Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site the association bonus does not count.

Would you like to answer one of these unanswered questions instead? Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. Ask Question. Asked 7 years, 10 months ago. Active 3 years, 2 months ago.