This will reset the default OS and will clear boot wait for old device.Ģ020 macOS Catalina, Big Sur APFS update: Note: if your system waits about half a minute before booting when only a new disk is left on the system, then press Alt/option key during startup and just select Mac OS X system.

Reboot and system will boot fast into old Mac OS X system.

Note: this step is necessary to avoid boot wait, because Mac cannot find original disk anymore, and starts into SSD only after about 30 seconds as recovery boot sequence. The boot option will be named exactly the same as was in original hard drive, thus just select it and system will reboot into this his.

Click the Apple menu on the bar at the top of screen and select Startup Disk to access the Choose Startup Disk tool.

Reboot to Recovery mode again and choose Boot from main partition in new SSD.

Click Restore and wait so many hours, how many you have to physically copy your data from one drive to another. Drag SSD prepared partition to Destination field (you called it SSD). Select Original Primary partition on the left (Macintosh HD) and on the right select Restore tab. Boot you Mac into Recovery mode again (Cmd+R). Do not connect original disk until you are done. Do not erase or start using old disk until everything is finished. Note: if this disk already was initialized or used on other system like Windows, please delete all existing partitions before this step and start like new! This is important to have new system bootable. Under format choose Mac OS X Extended (journaled) and click Erase. Click Erase tab and chose name for new device, I recommend to name it SSD, so you can clearly see difference in next steps. Connect new SSD drive to Mac if not done so yet, and select it on left in Disk Utility.

Now you have to prepare new SSD drive.

Macintosh HD) to resize to size smaller than new target SSD disk.

On the left now select primary disk it self (Type Logical Volume Group), and on the right select Partition tab, click + sign and drag primary partition (e.g.

Open Disk Utility, locate your existing HDD and select primary partition on the left (mount point /, Type: Logical Partition), this can be named Macintosh HD and in First Aid click Verify Disk, to make sure you are error free before start.Reboot your Mac and immediately hold Cmd+R during POST stage (black screen). Do it to external HDD or Time Capsule device. You need: 1 SSD drive and USB SATA adapter, it can be any enclosure, or SATA to USB adapter cable, or if you have thunderbolt or any faster connection this is even more preferred. This solution does not require any reinstall, all the way setup of user account and Mac settings, or separate programs or much more time consuming operations than direct disk to disk data transfer. The fastest and most efficient way can be done completely using standard tools in OS X. Clone larger HDD drive to smaller SSD drive on Mac.

Clone hdd to ssd macbook pro 2012