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The Missing Sync for Palm OS... Whether you have a Centro or Treo, The Missing Sync for Palm OS can synchronize your calendars, tasks, notes and contacts plus Word and Excel files, photos, videos and music playlists. The Missing Sync for Palm OS totally replaces HotSync Manager.

Sync your contacts
The Missing Sync for Palm OS synchronizes Entourage and Address Book, so that all of your categories, contact photos, postal, email and IM addresses are in sync. Say goodbye to incomplete transfers from Address Book via iSync.

Sync calendars and events
Tired of manually updating calendars and events on more...

What's New

Version 6.0.6:
  • Fixed an issue that caused the application to hang, which caused an inability to connect successfully after computer sleep or Bluetooth changes.


Mac OS X requirements:
  • Mac with a PowerPC G4, PowerPC G5 or Intel processor
  • Mac OS X 10.5.6 or later

Palm OS Device Requirements

  • Palm OS 4 or Palm OS 5
  • Native USB, Wi-Fi (802.11) or Bluetooth connection

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Missing Sync for Palm OS User Discussion

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MadEye29 Member IconComment+29

See how this has not been updated for two years? Go to MarkSpace's web site to read about how it won't sync Contacts that have birhtdays under Lion. How lame is that? After all, the contacts for which you have birthdays probably aren't important. I don't use it, so won't rate it. What is the term for software that is not being updated to fix bugs, but that is still being sold? How about "milkware" as in milking the customers.

Reply0 replies
Version 6.0.6
SprintiPhone Member IconReview+13

I stopped using this app few years ago, long before the iPhone and Android came out. At one time it worked well. But my computer stopped connecting to my Centro. When it did work, it duplicated events and addresses, and deleted events in iCal.

Reply0 replies
Version 6.0.6
Sampler Member IconComment+63

I have 6.0.4 installed and Check for Update claimed that I had the latest version.

I've used this app only for about a month, so I won't rate it yet, but so far it's worked well.

Reply1 reply
Version 6.0.5

Are you using Tiger or Leopard? 6.0.4 is the most recent version for Tiger, I believe.

Shralldam Member IconReview+62

Very satisfied by this application. The original Palm Desktop software doesn't work very well on my Mac Pro (and it's not Universal, btw). I've bought the Missing Sync and I have no regrets : reliable, easy and elegant.

Reply0 replies
Version 6.0.4
Drummerboy5678 Member IconComment+1

This is great but you have to pay $40 dollars for it. I found out a way of doing what it does for free! I made instructions at:

Reply1 reply
Version 6.0.4

The instructions about a free syncing system at that url are just the instructions for using the built-in Palm and iSync functions. I believe The Missing Sync has additional functionality such as syncing categories on the Palm with "Calendars" and "Groups" on the Mac. Without that ability, syncing would be pretty much useless for me.

bigdave56 Member IconReview+86

This app still needs serious work IMO. Failed to recognize synced calendars from previous versions. Went into conduit settings and selected the calendars I wanted. Events still don't show up in iCal. Told me user profile could not be synced because of conduits not existing and that I should edit profile. When I clicked 'OK', profile selection cleared, making it impossible to edit profile (and no information as to what needed to be edited was provided anyway.) Setup Assistant failed to recognize or rectify either of these problems. Sync was dramatically slower than v5.x under Tiger, especially considering all the information it failed to sync. Think upgrade is overpriced also, frankly. A major disappointment. This is as a longtime user of versions 4 and 5.

Reply3 replies
Version 6.0.2
A Cook

I am so VERY VERY frustrated with Missing Sync 6.0.4 I have had the same errors. In my case it is the Contacts / Notes that are not syncing. It appears that they go through BUT then if you make a change Missing Sync duplicates the contact. Even if you ask to find duplicates it does not register them as there is a slight difference. I have been in contact - well I should say I have gone to Missing Sync Tech support and left an email message but have had no response. I have also spent over 1 hr on the phone with a product specialist with Mac and they have had no luck. What has been established is that Missing Sync 5.1.2 works but has its limitations. But the upgrade to 6.0.4 is not compatible with Mac Book Pro even though Mark Space / Missing Sync say that it is. The Product Specialist says that Mark Space / Missing Sync needs to put a fix in for it and do an update. But since you can not get through to them, then I am SOL. Anyone got the fix yet??


First off, I'm using 6.0.4 on a MacBook Pro with OS 10.5.8 and it works there for me. So in theory it's possible.

(Or the most recent version, 6.0.6, might work better, though I haven't tried it.)

I have had issues with duplicate contacts, etc. in the past. Might have been caused by my previous use of Palm Desktop -- tech support told me that syncing with one program and then the other can cause problems.

Although I'm not tech support myself, I hope I've helped a little bit.


Oh by the way, I also started using iPalmMemo, a simple Mac app + Mark/Space conduit that exactly mirrors the handheld's Memos application.

(Could never get Mark/Space Notes to sync with Memos just right.)

bseidner Member IconComment+0

I had 15 years of Palm Desktop Windows data that I needed to move from my Treo 755p to iCal.

I had been dissatisfied with the Hotsync/iSync duo and decided to try Missing Sync despite the mixed reviews.

My first try was a disaster of over 9,000 conflicts needing reconciling.

I ponied up the $$ for a consult from Mark/Space and a very competent and thorough support fellow took control of my MacBook remotely and fixed it right up.

This program has worked flawlessly on my Tiger MacBook for a month.

The included conduits and applications are more than worth the cost of the program. It syncs all video and pictures I shoot. It syncs selected iTunes. There is a great app that mounts the Treo memory card in the Finder for file transfers. The Notepad is very capable and I use it instead of ToDo.

I am very very satisfied with this product. In the real world sometimes things don't work magically out of the box. This did not but it was dealing with a ton of data that had traveled across multiple platforms and operating systems. It took only a paid support call to straighten it out because I lacked the expertise. The whining about this product has me shaking my head.

It has been rock solid and better than that, it has been invisible

Reply0 replies
Version 6.0.2
darrellmac Member IconReview+0

Missing Sync has worked well for me over the past three years. I have consistently been able to sync my Treo 650 or Treo 680 to my Mac with very few problems, and when I had problems, they were nearly always a result of conflicts I had created with changes to the programs on my Palm or the categories into which I divided my data.

Moving to Leopard created some challenges. I was one of the lucky people who found that 6.0.2, beta 2, released within days of Leopard's release, worked flawlessly for synchronizing my iCal and Address book which are my only critical daily syncs. From reading the Missing Sync Beta Forums, it was clear that many folks were not so fortunate. In such cases, where problems are not consistent, it is very difficult to know whether the problem originates with Apple OS X, other third-party applications, or Markspace, the developer of Missing Sync.

Nonetheless, Markspace made betas available throughout the development process, provided forums for public comment (and comments gathered in such forums ALWAYS run to the negative, since people are far more inclined to voice problems,) and appeared to me to address the radical changes in Leopard rather quickly, given that many of the changes to the way OS X syncs were very late changes in the development of 10.5.

The final version of Missing Sync for Palm 6.0.2 works very well for me. I followed Markspace's release notes' directions of backing up data and overwriting data on my Palm with data from my Mac on first sync.

I post this review so other readers will see there are people who have come through the transition to Leopard and Missing Sync for Palm 6.0.2 quite satisfied. I do not intend to suggest that problems others have had are not legitimate. Missing Sync works great for me and I will continue to use it until iPhone 2 or 3 hits the market and makes its use unnecessary.

Reply0 replies
Version 6.0.2
pcohen961 Member IconComment-1

Do I hear a Class Action Suit. Do you think this thing will EVER work. Doubtfull.

Reply0 replies
Version 6.0.2
jan13 Member IconComment+236

.... and ONE more thing, I have NO problem to call people selling this trash Missing Sync for Palm OS 6.0.1. a thieves !!! ... since this is what they are !!!

Reply0 replies
Version 6.0.1
There are no Ratings for this App yet.
> 3 53


Current Version (6.x)


Downloads 88,932
Version Downloads 11,272
Type Utilities / Backup
License Demo
Date 19 Nov 2009
Platform OS X / PPC 32 / Intel 32
Price $39.95
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