Migration Assistant (from old mac)

Hello all,
I just migrated my old data to my new Macbook Pro (from a Macbook) and I have noticed in the Macintosh HD there are some additional folders. Kind of duplicates. These folders are:
Developer (from old mac)
opt (from old mac)
home (from old mac)
backup (from old mac)
I know these are from the migration I did. But I am not sure how my current system uses them. Some are in fact empty (except the Developer and opt) But my question is can I delete these without causes any issues? Or is it best to just leave them alone.
Any suggestions, thanks

Welcome to Apple Discussions,
As long as they are marked from old Mac you can safely delete them.
The best time to migrate is when you first boot your new Mac, if you migrate at a later date you can get duplication, or even a new Home folder.
-mj

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A A P L wrote:
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Message was edited by: V.K.

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Message was edited by: Steve M.

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Thanks for the info. I do know something about this (being a HW engineer), but I would have thought that the IDE master/slave jumpers would affect all the partitions on the disk. Since my emergency-boot partition is visible, I take that to mean that the IDE master/slave jumper issue is a non-issue for me.
I don't know if this helps, but here's what Disk Utility reports about the disk (not the volumes residing on it):
Name : ST380021A
Type : Disk
Disk Identifier : disk1
Media Name : ST380021A Media
Media Type : Generic
Connection Bus : ATA
Connection Type : Internal
Connection ID : Device 0
Partition Type : Applepartitionscheme
Device Tree : pci2/ata-6@D/@0:0
Writable : Yes
Ejectable : No
Mac OS 9 Drivers Installed : Yes
Location : Internal
Total Capacity : 74.5 GB (80,026,361,856 Bytes)
S.M.A.R.T. Status : Verified
Disk Number : 1
Partition Number : 0
Now, onto the partitions which I know less about.
Here's what Disk Utility says about the Macintosh HD partition:
Name : Macintosh HD
Type : Volume
Disk Identifier : disk1s10
Mount Point : /
File System : Mac OS Extended (Journaled)
Connection Bus : ATA
Partition Type : Apple_HFS
Device Tree : pci2/ata-6@D/@0:10
Writable : Yes
Universal Unique Identifier : E6E9B335-60D0-3F06-97F9-2A9BAC522106
Capacity : 68.4 GB (73,411,137,536 Bytes)
Free Space : 819.5 MB (859,291,648 Bytes)
Used : 67.6 GB (72,546,123,776 Bytes)
Number of Files : 367,638
Number of Folders : 74,198
Owners Enabled : Yes
Can Turn Owners Off : Yes
Can Repair Permissions : Yes
Can Be Verified : Yes
Can Be Repaired : Yes
Can Be Formatted : Yes
Bootable : Yes
Supports Journaling : Yes
Journaled : Yes
S.M.A.R.T. Status : Verified
Disk Number : 1
Partition Number : 10
Here's what Disk Utility says about my emergency-boot partition:
Name : Clean Boot
Type : Volume
Disk Identifier : disk1s12
Mount Point : /Volumes/Clean Boot
File System : Mac OS Extended (Journaled)
Connection Bus : ATA
Partition Type : Apple_HFS
Device Tree : pci2/ata-6@D/@0:12
Writable : Yes
Universal Unique Identifier : 4A704075-200F-3CCB-B8ED-E7FEEDB655EC
Capacity : 5.9 GB (6,345,846,784 Bytes)
Free Space : 3.8 GB (4,133,232,640 Bytes)
Used : 2.1 GB (2,212,093,952 Bytes)
Number of Files : 76,846
Number of Folders : 19,664
Owners Enabled : Yes
Can Turn Owners Off : Yes
Can Repair Permissions : Yes
Can Be Verified : Yes
Can Be Repaired : Yes
Can Be Formatted : Yes
Bootable : Yes
Supports Journaling : Yes
Journaled : Yes
S.M.A.R.T. Status : Verified
Disk Number : 1
Partition Number : 12
I don't know how to determine from the above what the "first" partition would be. I don't know how to post an attachment here otherwise I'd show a screen shot, but when I got into Disk Utility's partition tab, the emergency-boot partition (called Clean Boot) shows up at the bottom of the space indicating all of the HD's space, and Macintosh HD shows above Clean Boot.
So what are my options? Can I repartition w/o loosing Macintosh HD (I'm willing to loose the other partition Clean Boot)? Any way to change the partition numbers?
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