And it is also clear that the time to turn off FileVault decrypt is roughly similar to the time it takes to turn it on. While hardware-wise both computers are vastly different they had some similarities. Both run High Sierra and both have Bootcamp partitions.
Another interesting observation is the difference in encryption time between MBA with Yosemite and Mojave. There could be two possible explanations: either encryption in Mojave is slower than in Yosemite or the disk format matters.
It is possible, that encryption time with APFS is higher than with older disk formats. Does FileVault encrypt Bootcamp? No, FileVault only encrypts the Mac partition of the disk while Bootcamp partition is handled by Windows. However, it is possible to encrypt the Bootcamp Windows partition with BitLocker.
By the way, you can still switch from Mac partial to Bootcamp while encryption or decryption process is still in progress. Mac will pick up where it left off and continue with encryption while you are logged in macOS. The next test I think is the most important. Most people concern with the possible performance hit of encryption.
So, I tested disk performance with Blackmagic Disk Speed Test, I measured reads and writes before and after encryption and presented results in the table below. So, does FileVault affect performance? FileVault significantly degrades disk performance on all old Mac models.
The impact of the FileVault on disk writes is the highest, in some cases, down to a half. However, the problem was fixed with the introduction of T2 chips where encryption and decryption are happening on the hardware level. As stated above FileVault is an encryption mechanism. Only users who were enabled at the time when FileVault was turned on can access and read the files on the disk. FileVault is one of the tools provided by Apple to prevent data theft in cases of stolen or lost MacBooks.
The number of key combination in AES is 3. Assuming we use a computer which can calculate a million keys per second during a brute force attack then the time required to crack it will be 1.
Taking so far 3 hours and showing another 5 hours to go to turn off. I can't imagine why it would take that long. I wouldn't mind but I was hoping to turn it off just for a few hours while I was doing stuff that involved restarting quite a bit.
Wanted to set user to automatic login. I don't think I'll bother turning it back on after this. I know how to encrypt my private and important stuff and I have 2 back ups. One local and one time capsule at a different location.
I think I'm covered. I was experiencing severe speed degradation, CPU overloading, the spinning beach ball and forced reboots for several months. It primarily occurred during videos playing in Chrome or Safari, and during video conference calling, but also with other applications.
I was avoiding having to do a complete reinstall of macOS. That was around 2 hours by itself. At one point it was estimating DAYS, but it stabilized on 2hr, which ended up pretty accurate.
They will walk you through several steps and then have you turn it off. I just spent the better part of two hours doing this. And by the way you may lose the contents of your home directory during the decryption process.. Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams?
Communities Get Support. Sign in Sign in Sign in corporate. Browse Search. Ask a question. User profile for user: SpecializedTommy SpecializedTommy. Reply I have this question too 91 I have this question too Me too 91 Me too. All replies Drop Down menu. Loading page content. User profile for user: putnik putnik. If you stop it, the drive may be unusable. Depending on what fork of Android 5. Samsung, for example, offers a button here to decrypt your device. Skip to content Miscellaneous. May 18, Joe Ford.
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