Hi
I have a problem with apfs on my ssd external that I use for boot.
With High Sierra and both Mojave, booting from external ssd apfs is long (2 or 3 minutes)
Using HFS Journaled in High Sierra the boot is about 20"... But with Mojave it isn't possible using HFS.
So, the problem is APFS with external SSD
Any solutions?
Thanks
iMac, macOS Mojave (10.14), iMac 21,5'' 2018
I had this problem also since 10 nov 2018 when I bought a Samsung T5 500GB SSD and installed Mojave on it. Sometimes 4 minutes black screen before the AppleLogo appeared! Totally unacceptable, although workable... But I think i solved it. The problem appears to be that installing and updating the Samsung T5 Firmware needs at least one explicit eject and re-attach of this (external) SSD. But that is not possible while it is the disk where upon the OS is working! And re-assigning another disk to be the startup-disk does not count as a formal eject of the T5-ssd, because the restart takes place immediately without ejecting the ssd (so it seems). The solution:
Everything is probably caused by the fact that I had NOT activated the T5 SoftWare and FirmWare + ejected and re-attached the T5 BEFORE putting a new macOS on it. I did that deliberately, because I thought Mojave would know best how to format and install itself on this tiny little gem. That is true, but every time Mojave tried to re-start while installing etc. it got lost in space, because the T5-firmware was not effectively installed... And while working on the T5, we all could not eject it ... because it was the disk with the active OS on it...
So: an unsolvable loop. Which will come back every time when you update the firmware ! Because this firmware is not really designed for a bootable external ssd. And that is probably caused by the necessity to make attaching the data as secure as possible (that is what the T5-password-software tries to achieve).
Thus: first formatting and installing/updating the firmware on the T5 and immediately ejecting and re-attaching it is necessary. Mac Mojave will then re-format the ssd to APFS while installing, but the firmware is then already safely working in this little thing.
I put my SSD in a Delock 42510 Thunderbolt case and the boot delay disappeared.
But this enclosure have two issues:
1. In idle mode SSD heats to 39-40 C (at 20 C ambient). It was ~30 C in the old USB enclosure.
2. The drive increases its S.M.A.R.T. property "192 Unsafe Shutdown Count" every time I issue a "Sleep" command. I have not such problem with my USB case (both cases are powered with external power adapters). I use DriveDx app to read S.M.A.R.T. data.
So, I can't recommend Delock 42510 case. Does anyone have any experience with AKiTiO eSata to Thunderbolt adapter?
I fixed it but its not pretty...
i just took my imac apart and installed the ssd internally.
no delay at all, everything is instant.
Will just a USB3 to Thunderbolt adapter solve the issue I wonder.
Same here.
With AFPS external SSD High Sierra booting done, up to 20-30secs more or less.
Upgrated to Mojave, the booting is now extremely slow, up to 2-3 minutes more or less.
Anyone found solutions ?
Thanks in advance,
Best Regards.
Same here, there must be quite a few people who opted to run the OS from an external SSD rather than risking installing it internally as iMac's are just not very friendly for such upgrades.
I think in High Sierra it only gave you the option to stay as HFS+ if your OS SSD was internal? I dont recall having to force it to stay as HFS+ when I did that upgrade.
Considering APFS has been an option since High Sierra I would have hoped they were aware and found a solution for this by now. From what's been said here though it seems just be to with external (USB?) SSDs. This is similar to trying to run Windows on an external drive, as without a registry edit it cannot find the drive during the boot process.
It is also an annoyance for us Bootcamp users who can now only switch between Windows and OS X by holding ALT down during boot...another thing they haven't resolved yet :/
Sorry I haven't been able to offer any help though.
Sure,
he has a classic Lacie SSD Thunderbold 1TB (STFS1000401), but he is crazy 😀
He told me he paid him over € 500.
If the system goes and it is robust maybe I could think to buy the one with the lowest cost: D
Same problem here:
iMac 21" later 2017 8GB RAM
SSD + USB 3.1/C case
Boot times:
High Sierra = 25 seconds after power on, Apple logo shows fast
Mojave (APFS) = About 3 ~ 4 minutes, big delay on Apple logo; after appear, Mojave starts fast.
Yeah .. sigh I bought a sandisk extreme SSD so I can enjoy atleast a fast boot time and here comes Mojave.. What is going on in Apple.. first they made it so hard to open the system an install it yourself and now this.
If only mine was just 4 minutes. 90 minutes is about what I get with a MacPro (2013) and Mojave. It was the same with High Sierra. And i just replaced my samsung 860evo (in an inatec case) with a sandisk extreme because i was convinced it was the samsung going bad... waste of £200 there.
Thanks apple... no it was nothing. Really... nothing...
Needless to say the chances of me buying another mac ever again are pretty bloody slim... testing of any description seems to have been thrown out completely in the last few years with all apple products
Yep, fixed also for me using a Crucial SSD (MX500 500Gb) as external boot device.
Apple Logo is coming up within 15 sec i.o. 4 minutes with release 10.14.2 , boot completed and login window appears in less than 1 min.
Thanks Apple :)
When Mojave was released I updated from Sierra to HS. I was sorry I did that when I ran into all the messy APFS business. However, by staying one OS behind the current release, there was plenty of accurate advice about the APFS problems. Of course, if everybody stayed one OS behind...
Same here, exactly the same problem on a external SSD.
not found a solution yet
Hi, your answer isn't the solution to the problem, but it's a solution. Can you write the model of thunderbolt enclosure for the SSD and the SSD that you are using now? Thank you very much!
they're crazy expensive for an enclosure
Is it thunderbolt 2 or 3?
Problem slow boot with apfs on ssd external
