What is most recent boot ROM compatible with Snow Leopard?

Just got a fine refurb Qc i5 27" iMac which was reportedly manufactured in May 2011. It's tested and warranteed by Apple, and came with Lion installed. I am hoping I can back-grade it to Snow Leopard to make the human interface like the file systems on our other 10.5/10.6 machines.
I am guessing that I might be able to do this if it indeed was made in May, before Lion shipped on all newer machines.
I suppose I can set up an external drive and install 10.6 externally and see if the installer allows it. Wouldn't that indicate the the ROM is compatible with 10.6?
The iMac boot ROM version is
IM121.0047B0A
Thanks for a definitive answer!

Update from OP: I made an extra tray in my MacPro with a test install of 10.6.8. Booted ok as alternate drive in that machine. Then I used Carbon Copy Cloner to make a bootable copy on an external LaCie drive. Plugged the LaCie into the quad-core iMac, which recognized it as a potential startup drive via FW 800. It booted fine. I suspect if I zeroed the iMac's drive, then I might be able to boot the SnoLeo install disk and install, or boot from my LaCie external drive and use CCC to clone to the iMac's drive.
I'm concluding that the May 2011 firmware is fine for 10.6, as it was shipped that way on the spring releases. So now I'm guessing that Lion's new recovery structure may interfere with a "backgrade" install. I'll scrape and sand the internal disk after cloning it for good measure, then try to install 10.6. More notes in a week or so.

Similar Messages

What is most recent Firefox version compatible with Upek fingerprint reader

I use Upek Protector Suite with my Dell Vostro laptop's fingerprint reader. It worked with Firefox v3.5, but seems not to like Firefox v3.6, so I'm really doubtful about upgrading to v4 unless someone points me at the compatible plug-in or extension please. Thanks!

See:
*http://www.upek.com/support/customersupport/techsupport/Topic.asp?ID_Topic=75

Is my Imac compatible with Snow Leopard?

Hi, I have been reading through the posts trying to find a solution for the strange things my computer is doing (or rather, NOT doing) since I installed Snow Leopard.
I read that SL is not compatible with all machines... Could anyone tell me if my machine DOES qualify? Could an "incompatability" be the source of my computer strangeness?
When I click on "About this Mac" I am told I have "Mac OS X Version 10.6" (but it does not specify which version of 10.6). Is that normal?
My Hardware Overview is :
Model Name: iMac
Model Identifier: iMac6,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2,16 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 4 MB
Memory: 4 GB
Bus Speed: 667 MHz
Boot ROM Version: IM61.0093.B07
SMC Version (system): 1.10f3
Hardware UUID: 00000000-0000-1000-8000-0017F2C4F6F8
THANK YOU FOR YOUR INPUT!!!

Could an "incompatability" be the source of my computer strangeness?
Most definitely. Quite a few applications & other kinds of software are compatible with one version of an OS but not with the next. Without a clue about what kind of "strangeness" you are experiencing, it is hard to make specific recommendations, but you should make sure everything you have installed that did not come from Apple is the most up-to-date version offered & known to be compatible with Snow Leopard.

Compatible with Snow Leopard?

Is my 2.16 17" MacBook Pro Core Duo going to be compatible with Snow Leopard? Or is it time to think of a new machine?

I have a 15inch Macbook Pro from mid 2008 and wanted to know if it was capable of supporting the new Snow Leopard in 64 Bit?
Here are more specs on what I have:
Any feedback would be greatly appreciated.
Model Name: MacBook Pro
Model Identifier: MacBookPro4,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2.5 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 6 MB
Memory: 4 GB
Bus Speed: 800 MHz
Boot ROM Version: MBP41.00C1.B03
SMC Version (system): 1.27f2

Leopard backup compatible with Snow Leopard?

Hi I tried to upgrade my macbook from 10.5.8 to SL 10.6.3 but seems to be stucked in the boot process.
I did make an backup before installing but I wonder if it is compatible with Snow Leopard?
Should wipe the disk and reinstall and can I still find all files in the old backup then?

What kind of backup did you make? If it was bootable (eg Time Machine, or a clone) it wouldn't have to be compatible with Snow Leopard, since you're just going to recover that 10.5 backup and then, hopefully, try the upgrade again. If it was a Time Machine backup, you'll need to use your original 10.5 install disks and choose the "Recover from Time Machine" menu option when you boot to it.
Can I ask what disks you used to attempt the 10.6 upgrade? (eg, where did you get them, what color are they?)
Matt
Message was edited by: Matt Clifton

Are my apps compatible with snow leopard?

I recently upgraded my system from Leopard to Lion without first checking to see whether it would affect my compability with other applications. Dumb. I now can't run MacDraft 5.5.8, Filemaker Pro 6 or Quicken 7. If I partiall downgrade my system to Snow Leopard, will these applications work, or do I need to go all the way back to Leopard? I have both disks and am backed up to an external HD via Time Machine.

You cannot "partially" downgrade. You can erase Lion and install Leopard or Snow Leopard. Check the developers' websites to find out about product compatibility. Quicken 7 is compatible with Snow Leopard.
You can retain Lion and create another partition on your hard drive on which you can install Snow Leopard or Leopard.
To resize the drive do the following:
1. Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
After the main menu appears select Disk Utility and click on the Continue button. Select the hard drive's main entry then click on the Partition tab in the DU main window.
2. You should see the graphical sizing window showing the existing partitions. A portion may appear as a blue rectangle representing the used space on a partition.
3. In the lower right corner of the sizing rectangle for each partition is a resizing gadget. Select it with the mouse and move the bottom of the rectangle upwards until you have reduced the existing partition enough to create the desired new volume's size. The space below the resized partition will appear gray. Click on the Apply button and wait until the process has completed. (Note: You can only make a partition smaller in order to create new free space.)
4. Click on the [+] button below the sizing window to add a new partition in the gray space you freed up. Give the new volume a name, if you wish, then click on the Apply button. Wait until the process has completed.
You should now have a new volume on the drive.
It would be wise to have a backup of your current system as resizing is not necessarily free of risk for data loss. Your drive must have sufficient contiguous free space for this process to work.
You can then restart the computer from the installer DVD for Leopard or Snow Leopard and install onto the new partition. To boot into the older version of OS X restart the computer and after the chime press and hold down the OPTION key until the boot manager appears. Select the icon for the system you want to use then click on the arrow button below the icon.

Versions of iMovie and iPhoto compatible with Snow Leopard

I finally managed to reinstall iMovie and iPhoto into the Snow Leopard side of my hard drive (I have partitioned it into Snow Leopard and
Mountain Lion). I want to use the last versions of both that are still compatible with Snow Leopard, but I don't want to download any updates that will take me into Mountain Lion territory.The iMovie version that I have downloaded is 8.0.4 (807), and the iPhoto version is 81 (415). What versions are only compatible with Mountain Lion?

Mende1,
If I understand you correctly, I can get the most advanced versions of iMovie and iPhoto in iLife 11. Furthermore, there is no danger of updating to the point that they will no longer be compatible with Snow Leopard. If I had known that before,I could have saved myself a great deal of trouble, and I could have done it long ago. Well, live and learn.

Leopard TM backups are NOT compatible with Snow Leopard

I just discovered while upgrading to Snow Leopard that Time Machine backups made in Leopard are not compatible with Snow Leopard at this time. So, for those of you who are considering upgrading to Snow Leopard using your TM backups to restore your data, the TM backup will not be recognised by Snow Leopard.
I called Apple Care to check this when I went to restore my data as I had done an Erase and Install, and they confirmed that I would have to either:
a) use the data on my TM drive as any other data only backup, or
b) re-inslall Leopard, restore the TM backup, then upgrade to Snow Leopard rather than erase and install.
For info

Scott in MD wrote:
Incidentally, yes, the "package" file is the in.Progress file. It seems to have the incremental updates, since it's a real big file, and has very recent entries. Again the last set of timestamped folders (i.e. a full backup) was over a year ago.
No, something's very wrong. All (completed) TM backups are the same.
Inside the Backups.backupdb folder should be a single folder with your computer name; inside that should be a series of folders with the date & time of each remaining backup, plus the Latest folder which is an alias to the most recent of the date & time folders, except an "in.Progress" folder.
The "in.Progress" folder is an incomplete (failed or cancelled) backup, and is ignored in all TM displays, since it's unusable.
In any event I have not deleted or changed any of the files. Also the stuff in the "Latest" folder is over a year old. But I've had TM running the whole time.
So does that mean (I'm hoping) that my recent stuff will be recovered from the inProgress file if I can ever get this working? Or does it mean I'm screwed anyways, because the best I can get is the files from the Latest or most recent timestamped folder (again, both a year back).
First, run +*Repair Disk+* again (and again) until it either fixes all the errors or can't fix any more. If it can't fix any more, it's barely possible a heavy-duty 3rd-party app such as +DiskWarrior 4.2+ can (it's about $100).
Let's see if DU can fix it on a second pass. Hopefully it will, and the problem was preventing the more recent backups from appearing.

FC Studio 2 compatible with Snow Leopard?

H there,
I am in the process of buying a new computer, upgrading from a G4. I use Final Cot Studio 2 (with FCP6) and wonder, if this is compatible with snow leopard. I tired to find an answer on this, but a lot of people seemed to have problems when they install snow leopard. In my case, it would be installing Final Cut from the CD's and them upgrading to the latest version. Ideally, I would like to wait and not buy FCP7 yet. Can anyone advice me on the compatibility?
Many thanks,
Anita

From what I've read, it is important to install FCP 6 and all updates from the original install discs over a clean install of SL.
Problems seem to arise with upgrade installs.
Hope this helps.

Is DVD Studio Pro 4 compatible with Snow Leopard 10.6.8?

Is DVD Studio Pro 4 compatible with Snow Leopard? Project burns fine, simulates fine, works on my two macs (mac pro & macbook pro networked) but when I put the dvd in to a dvd played hooked to a tv it doesn't recoginize it and says "this disc connot be played"!

It's your set top DVD player that won't play the disk... That or it's the type of disk that you're using.
Make sure it's a DVD-R. That's a MINUS.
They pretty much work in all set top DVD players.
The reason your computers play the dvd's is simply because your computer knows what to do with all types of media. Something else to consider could be the optical read capability on your computer is better than that of your DVD player. Perhaps the DVD is a poor quality disk. You computer can read it because it has a higher quality optical pickup unit.
First things first, take your DVD to a place that sells DVD players and try it in a new player. That'll tell you whether or not the disk actually works.
HTH
-Graham

Where can I get a version of Aperture compatible with Snow Leopard?

I have Snow Leopard (10.6) on my iMAC and I did not upgrade to Lion as it is good enough for what I do with my iMAC.
Unfortunately, the Aperture version available in the App Store recommends MAC OS 1.7 or later.
Is there a previous version of Aperture, which is compatible with Snow Leopard (10.6), still available?
If so, where can I get it?
Thank you in advance to the Apple community.
Philippe

As keith alluded to if you stay with SL and get a version of Aperture that runs on it you will be locked into that. There will be no more updates for Aperture or the Raw Camera bundle.
So if that version of Aperture supports your camera and you have no plans to change cameras to something that is not supported in that version then you will be fine.
If you think you might be getting a new camera at some point then you might just want to bit the bullet and do the upgrades now.
regards

Is VMWare Fusion 2.0.5 compatible with Snow Leopard?

Anyone knows if VMWare Fusion 2.0.5 is compatible with Snow Leopard?

I was able to get mine to boot by
1) loading my backup 10.5.8 onto an external disk as a bootable version
2) boot my MBP from the external
3) run vmware and do a shut down on the XP
4) copy the instance of XP from my external to my internal
5) I don't remember if I had to delete preferences or not... but I don't think so
We had to downgrade a couple of Mac Mini's to 10.5.8 to get them to run VMWare without having the system hang up with the black screen of restart death after between a few hours and 2 days of running. We are pretty rough with our code and have 2 instances of VMWare running 2 different XP's at the same time.

My Snow Leopard 10.6.3 has Safari 4.0.4 but this cannot be used for the new features of iTune. I tried upgrading to Safari 5.1.7 but it needs Snow Leopard 10.6.8. Where can I get a version of Safari 5.1 that is compatible with Snow Leopard 10.6.3?

My Snow Leopard 10.6.3 has Safari 4.0.4 but this cannot be used for the new features of iTunes. I tried upgrading to Safari 5.1.7 but it needs Snow Leopard 10.6.8. Where can I get a version of Safari 5.1 that is compatible with Snow Leopard 10.6.3?

Hi..
here can I get a version of Safari 5.1 that is compatible with Snow Leopard 10.6.3?
Not possible. You need to update to v10.6.8
Click your Apple menu > Software Update
Or update using the this download > Mac OS X 10.6.8 Update Combo
Then restart your Mac.

Is adobe photoshop lightroom 2.0 compatible with snow leopard (10.6) ?

adobe photoshop lightroom 2.0 compatible with snow leopard (10.6) ?

The official line is yes. However, some users have experienced some problems. Whether these are due to incompatibility or problems resulting from the upgrade process is not yet clear.
The only acknowledge issue relates to Edit in Photoshop command not transferring images for Photomerge or as Smart Objects.
Note: Except for above, I'm running Lr 2.4 on a MacBook Pro with Snow Leopard without issue.

Does anyone know if Adobe Photoshop CS5.1 is compatible with Snow Leopard?

Does anyone know if Adobe Photoshop CS5.1 is compatible with Snow Leopard?

Yes it is, all versions from CS2 up will work.

What is most recent boot ROM compatible with Snow Leopard?

Similar Messages

Maybe you are looking for